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configure.ac
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#**************************************************************************
#* *
#* OCaml *
#* *
#* Sebastien Hinderer, projet Gallium, INRIA Paris *
#* *
#* Copyright 2018 Institut National de Recherche en Informatique et *
#* en Automatique. *
#* *
#* All rights reserved. This file is distributed under the terms of *
#* the GNU Lesser General Public License version 2.1, with the *
#* special exception on linking described in the file LICENSE. *
#* *
#**************************************************************************
# Process this file with autoconf to produce a configure script.
# Require Autoconf 2.71 for repeatability in CI
AC_PREREQ([2.71])
AC_INIT([OCaml],
[OCAML__VERSION],
[ocaml],
[http://www.ocaml.org])
AC_MSG_NOTICE([Configuring OCaml version AC_PACKAGE_VERSION])
# Configuration variables
## Command-line arguments passed to configure
CONFIGURE_ARGS="$*"
# Command to build executables
# Ultimately, MKEXE may build an executable using the C compiler or it may use
# a wrapper for a linker (i.e. flexlink). The build system must therefore not
# rely on $CFLAGS because these cannot be processed by flexlink (and are not
# passed)
mkexe_cmd='$(CC)'
mkexe_cflags='$(OC_CFLAGS) $(CFLAGS)'
mkexe_extra_flags=''
mkexe_via_cc_extra_cmd=''
mkexe_ldflags_prefix=''
mkexe_via_cc_ldflags_prefix=''
# Flags for building executable files with debugging symbols
mkexedebugflag="-g"
common_cflags=""
common_cppflags=""
internal_cflags=""
internal_cppflags=""
ocamlc_cflags=""
ocamlc_cppflags=""
oc_ldflags=""
oc_dll_ldflags=""
oc_exe_ldflags=""
tsan=false
oc_tsan_cflags="-fsanitize=thread"
# Passed to the linker by ocamlopt when tsan is enabled
oc_tsan_cppflags="-DWITH_THREAD_SANITIZER"
# The C# compiler and its flags
CSC=""
CSCFLAGS=""
ostype="Unix"
SO="so"
toolchain="cc"
reserved_header_bits=0
instrumented_runtime=false
instrumented_runtime_libs=""
bootstrapping_flexdll=false
flexdll_dir=
lib_dynlink=false
lib_str=false
lib_systhreads=false
lib_unix=false
ocamltest_libunix=None
ocamltest_unix_impl="dummy"
ocamltest_unix_name=""
ocamltest_unix_path=""
ocamltest_unix_include=""
# Information about the package
## Source directory
AC_CONFIG_SRCDIR([runtime/interp.c])
## Directory containing auxiliary scripts used during build
AC_CONFIG_AUX_DIR([build-aux])
## Output variables
AC_SUBST([CONFIGURE_ARGS])
AC_SUBST([native_compiler])
AC_SUBST([default_build_target])
AC_SUBST([VERSION], [AC_PACKAGE_VERSION])
AC_SUBST([OCAML_DEVELOPMENT_VERSION], [OCAML__DEVELOPMENT_VERSION])
AC_SUBST([OCAML_RELEASE_EXTRA], [OCAML__RELEASE_EXTRA])
AC_SUBST([OCAML_VERSION_MAJOR], [OCAML__VERSION_MAJOR])
AC_SUBST([OCAML_VERSION_MINOR], [OCAML__VERSION_MINOR])
AC_SUBST([OCAML_VERSION_PATCHLEVEL], [OCAML__VERSION_PATCHLEVEL])
AC_SUBST([OCAML_VERSION_EXTRA], [OCAML__VERSION_EXTRA])
AC_SUBST([OCAML_VERSION_SHORT], [OCAML__VERSION_SHORT])
AC_SUBST([CC])
AC_SUBST([DIFF_FLAGS])
AC_SUBST([CSC])
AC_SUBST([CSCFLAGS])
# Note: This is present for the flexdll bootstrap where it exposed as the old
# TOOLPREF variable. It would be better if flexdll where updated to require
# WINDRES instead.
AC_SUBST([ac_tool_prefix])
AC_SUBST([exeext])
AC_SUBST([OBJEXT])
AC_SUBST([libext])
AC_SUBST([S])
AC_SUBST([runtime_asm_objects])
AC_SUBST([SO])
AC_SUBST([arch])
AC_SUBST([arch64])
AC_SUBST([model])
AC_SUBST([system])
AC_SUBST([native_cflags])
AC_SUBST([native_cppflags])
AC_SUBST([systhread_support])
AC_SUBST([ocamlsrcdir])
AC_SUBST([unix_or_win32])
AC_SUBST([ln])
AC_SUBST([ocamlyacc_wstr_module])
AC_SUBST([outputexe])
AC_SUBST([outputobj])
AC_SUBST([syslib])
AC_SUBST([fpic])
AC_SUBST([mkexe])
AC_SUBST([mkexe_exp])
AC_SUBST([mkexedebugflag])
AC_SUBST([mkexe_extra_flags])
AC_SUBST([mkexe_via_cc_ldflags])
AC_SUBST([ccomptype])
AC_SUBST([toolchain])
AC_SUBST([oc_cflags])
AC_SUBST([tsan])
AC_SUBST([tsan_native_runtime_c_sources])
AC_SUBST([oc_cppflags])
AC_SUBST([oc_ldflags])
AC_SUBST([oc_dll_ldflags])
AC_SUBST([oc_exe_ldflags])
AC_SUBST([cclibs])
AC_SUBST([native_ldflags])
AC_SUBST([ocamlc_cflags])
AC_SUBST([ocamlc_cppflags])
AC_SUBST([flexdll_source_dir])
AC_SUBST([bootstrapping_flexdll])
AC_SUBST([flexdll_dir])
AC_SUBST([flexlink_flags])
AC_SUBST([long_shebang])
AC_SUBST([shebangscripts])
AC_SUBST([AR])
AC_SUBST([mklib])
AC_SUBST([supports_shared_libraries])
AC_SUBST([natdynlink])
AC_SUBST([natdynlinkopts])
AC_SUBST([natdynlink_archive])
AC_SUBST([cmxs])
AC_SUBST([debug_runtime])
AC_SUBST([instrumented_runtime])
AC_SUBST([instrumented_runtime_libs])
AC_SUBST([has_monotonic_clock])
AC_SUBST([otherlibraries])
AC_SUBST([lib_dynlink])
AC_SUBST([lib_runtime_events])
AC_SUBST([lib_str])
AC_SUBST([lib_systhreads])
AC_SUBST([lib_unix])
AC_SUBST([ocamltest_CPP])
AC_SUBST([ocamltest_libunix])
AC_SUBST([ocamltest_unix_impl])
AC_SUBST([ocamltest_unix_name])
AC_SUBST([ocamltest_unix_path])
AC_SUBST([ocamltest_unix_include])
AC_SUBST([cc_has_debug_prefix_map])
AC_SUBST([as_has_debug_prefix_map])
AC_SUBST([with_debugger]) # TODO: rename this variable
AC_SUBST([build_ocamldebug])
AC_SUBST([build_ocamltex])
AC_SUBST([ocamldoc])
AC_SUBST([build_ocamldoc])
AC_SUBST([documentation_tool])
AC_SUBST([documentation_tool_cmd])
AC_SUBST([ocamltest])
AC_SUBST([ASPP])
AC_SUBST([endianness])
AC_SUBST([AS])
AC_SUBST([asm_cfi_supported])
AC_SUBST([sharedlib_cflags])
AC_SUBST([rpath])
AC_SUBST([mkdll])
AC_SUBST([mkdll_exp])
AC_SUBST([mkmaindll])
AC_SUBST([mkmaindll_exp])
AC_SUBST([mksharedlibrpath])
AC_SUBST([install_bytecode_programs])
AC_SUBST([install_source_artifacts])
AC_SUBST([install_ocamlnat])
AC_SUBST([reserved_header_bits])
AC_SUBST([frame_pointers])
AC_SUBST([flambda])
AC_SUBST([flambda_invariants])
AC_SUBST([cmm_invariants])
AC_SUBST([windows_unicode])
AC_SUBST([flat_float_array])
AC_SUBST([function_sections])
AC_SUBST([oc_native_compflags])
AC_SUBST([afl])
AC_SUBST([flexdll_chain])
AC_SUBST([mkdll_ldflags_exp])
AC_SUBST([mkexe_ldflags_exp])
AC_SUBST([PACKLD])
AC_SUBST([stdlib_manpages])
AC_SUBST([compute_deps])
AC_SUBST([ocaml_bindir])
AC_SUBST([ocaml_libdir])
AC_SUBST([QS])
AC_SUBST([ar_supports_response_files])
## Generated files
AC_CONFIG_FILES([Makefile.build_config])
AC_CONFIG_FILES([Makefile.config])
AC_CONFIG_FILES([stdlib/sys.ml])
AC_CONFIG_FILES([manual/src/version.tex])
AC_CONFIG_FILES([manual/src/html_processing/src/common.ml])
AC_CONFIG_FILES([ocamltest/ocamltest_config.ml])
AC_CONFIG_FILES([utils/config.generated.ml])
AC_CONFIG_HEADERS([runtime/caml/m.h])
AC_CONFIG_HEADERS([runtime/caml/s.h])
AC_CONFIG_HEADERS([runtime/caml/version.h])
AC_CONFIG_FILES([compilerlibs/META])
AC_CONFIG_FILES([otherlibs/dynlink/META])
AC_CONFIG_FILES([otherlibs/runtime_events/META])
AC_CONFIG_FILES([stdlib/META])
# Definitions related to the version of OCaml
AC_DEFINE([OCAML_VERSION_MAJOR], [OCAML__VERSION_MAJOR])
AC_DEFINE([OCAML_VERSION_MINOR], [OCAML__VERSION_MINOR])
AC_DEFINE([OCAML_VERSION_PATCHLEVEL], [OCAML__VERSION_PATCHLEVEL])
m4_if([OCAML__VERSION_EXTRA],[], [],
[AC_DEFINE([OCAML_VERSION_ADDITIONAL], ["][OCAML__VERSION_EXTRA]["])
AC_DEFINE([OCAML_VERSION_EXTRA], ["][OCAML__VERSION_EXTRA]["])])
AC_DEFINE([OCAML_VERSION], [OCAML__VERSION_NUMBER])
AC_DEFINE([OCAML_VERSION_STRING], ["][OCAML__VERSION]["])
# Works out how many "o"s are needed in quoted strings
AC_CONFIG_COMMANDS_PRE(OCAML_QUOTED_STRING_ID)
# Checks for system types
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
# Ensure that AC_CONFIG_LINKS will either create symlinks which are compatible
# with native Windows (i.e. NTFS symlinks, not WSL or Cygwin-emulated ones) or
# use its fallback mechanisms. Native Windows versions of ocamlc/ocamlopt cannot
# interpret either WSL or Cygwin-emulated symlinks.
AS_CASE([$host],
[*-pc-windows|*-w64-mingw32*],
[AC_CONFIG_COMMANDS([native-symlinks], [],
[export CYGWIN="\$CYGWIN\${CYGWIN:+ }winsymlinks:nativestrict"
export MSYS="\$MSYS\${MSYS:+ }winsymlinks:nativestrict"])])
# Systems that are known not to work, even in bytecode only.
AS_CASE([$host],
[*-pc-windows],
[AC_MSG_ERROR([the MSVC compiler is not supported currently], 69)],
[i386-*-solaris*],
[AC_MSG_ERROR([Building for 32 bits target is not supported. \
If your host is 64 bits, you can try with './configure CC="gcc -m64"' \
(or "cc -m64" if you don't have GCC).])])
# MSVC special case
AS_CASE([$host],
[*-pc-windows],
[CC=cl
ccomptype=msvc
S=asm
SO=dll
outputexe=-Fe
syslib='$(1).lib'],
[ccomptype=cc
S=s
SO=so
outputexe='-o '
syslib='-l$(1)'])
AS_CASE([$host],
[*-*-mingw32*|*-pc-windows],
[CSC=csc
CSCFLAGS="/nologo /nowarn:1668"
AS_CASE([$host_cpu], [i*86], [CSCFLAGS="$CSCFLAGS /platform:x86"])])
# Environment variables that are taken into account
AC_ARG_VAR([AS], [which assembler to use])
AC_ARG_VAR([ASPP], [which assembler (with preprocessor) to use])
AC_ARG_VAR([PARTIALLD], [how to build partial (relocatable) object files])
# Command-line arguments to configure
AC_ARG_ENABLE([debug-runtime],
[AS_HELP_STRING([--disable-debug-runtime],
[do not build runtime with debugging support])])
AC_ARG_ENABLE([ocamldebug],
[AS_HELP_STRING([--enable-ocamldebug],
[build ocamldebug @<:@default=auto@:>@])],
[],
[enable_ocamldebug=auto])
AC_ARG_ENABLE([debugger],
[AS_HELP_STRING([--enable-debugger],
[alias for --enable-ocamldebug])],
[enable_ocamldebug=$enableval],
[])
AC_ARG_ENABLE([dependency-generation],
[AS_HELP_STRING([--disable-dependency-generation],
[do not compute dependency information for C sources])],
[],
[enable_dependency_generation=auto])
AC_ARG_VAR([DLLIBS],
[which libraries to use (in addition to -ldl) to load dynamic libs])
AC_ARG_ENABLE([instrumented-runtime],
[AS_HELP_STRING([--enable-instrumented-runtime],
[build the instrumented runtime @<:@default=auto@:>@])],
[],
[enable_instrumented_runtime=auto])
AC_ARG_ENABLE([vmthreads], [],
[AS_IF([test "x$enableval" != 'xno'],
[AC_MSG_ERROR(m4_normalize([The vmthreads library is no longer available.
It was deleted in OCaml 4.09.]))])],
[])
AC_ARG_ENABLE([systhreads],
[AS_HELP_STRING([--disable-systhreads],
[disable the Win32/POSIX threads library])])
AC_ARG_ENABLE([tsan],
[AS_HELP_STRING([--enable-tsan],
[enable ThreadSanitizer support @<:@default=no@:>@])],
[],
[enable_tsan=no])
# Preprocessor and linker flags for libunwind (currently only used when TSan is
# enabled)
AC_ARG_VAR([LIBUNWIND_CPPFLAGS],
[C preprocessor flags for libunwind (e.g. -I<location of libunwind headers>)])
AC_ARG_VAR([LIBUNWIND_LDFLAGS],
[linker flags for libunwind (e.g. -L<location of libunwind>])
AC_ARG_ENABLE([graph-lib], [],
[AS_IF([test "x$enableval" != 'xno'],
[AC_MSG_ERROR(m4_normalize([The graphics library is no longer distributed
with OCaml since version 4.09. It is now distributed as a separate
"graphics" package: https://github.com/ocaml/graphics]))])],
[])
AC_ARG_ENABLE([str-lib],
[AS_HELP_STRING([--disable-str-lib],
[do not build the str library])])
AC_ARG_ENABLE([unix-lib],
[AS_HELP_STRING([--disable-unix-lib],
[do not build the unix library])])
AC_ARG_ENABLE([bigarray-lib], [],
[AS_IF([test "x$enableval" != 'xno'],
[AC_MSG_ERROR(m4_normalize([The bigarray-lib option was deleted in OCaml
5.0, as the Bigarray module is now part of the standard library.]))])],
[])
AC_ARG_ENABLE([ocamldoc],
[AS_HELP_STRING([--disable-ocamldoc],
[do not build the ocamldoc documentation system])],
[],
[ocamldoc=auto])
AC_ARG_WITH([odoc],
[AS_HELP_STRING([--with-odoc],
[build documentation with odoc])])
AC_ARG_ENABLE([ocamltest],
[AS_HELP_STRING([--disable-ocamltest],
[do not build ocamltest])])
AC_ARG_ENABLE([native-toplevel],
[AS_HELP_STRING([--enable-native-toplevel],
[build the native toplevel])])
AC_ARG_ENABLE([frame-pointers],
[AS_HELP_STRING([--enable-frame-pointers],
[use frame pointers in runtime and generated code])])
AC_ARG_ENABLE([naked-pointers], [],
[AS_IF([test "x$enableval" != 'xno'],
[AC_MSG_ERROR([Naked pointers were prohibited in OCaml 5.0.])])],
[])
AC_ARG_ENABLE([naked-pointers-checker], [],
[AS_IF([test "x$enableval" != 'xno'],
[AC_MSG_ERROR([The naked pointers checker was removed in OCaml 5.0.])])],
[])
AC_ARG_ENABLE([spacetime], [],
[AS_IF([test "x$enableval" != 'xno'],
[AC_MSG_ERROR([spacetime profiling was deleted in OCaml 4.12.])])],
[])
AC_ARG_ENABLE([cfi],
[AS_HELP_STRING([--disable-cfi],
[disable the CFI directives in assembly files])])
AC_ARG_ENABLE([imprecise-c99-float-ops],
[AS_HELP_STRING([--enable-imprecise-c99-float-ops],
[enables potentially imprecise replacement implementations
of C99 float ops if unavailable on this platform])])
AC_ARG_ENABLE([installing-source-artifacts],
[AS_HELP_STRING([--enable-installing-source-artifacts],
[install *.cmt* and *.mli files])])
AC_ARG_ENABLE([installing-bytecode-programs],
[AS_HELP_STRING([--enable-installing-bytecode-programs],
[also install the bytecode versions of programs])])
AC_ARG_ENABLE([native-compiler],
[AS_HELP_STRING([--disable-native-compiler],
[do not build the native compiler])])
AC_ARG_ENABLE([flambda],
[AS_HELP_STRING([--enable-flambda],
[enable flambda optimizations])])
AC_ARG_ENABLE([flambda-invariants],
[AS_HELP_STRING([--enable-flambda-invariants],
[enable invariants checks in flambda])])
AC_ARG_ENABLE([cmm-invariants],
[AS_HELP_STRING([--enable-cmm-invariants],
[enable invariants checks in Cmm])])
AC_ARG_WITH([target-bindir],
[AS_HELP_STRING([--with-target-bindir],
[location of binary programs on target system])])
AC_ARG_ENABLE([reserved-header-bits],
[AS_HELP_STRING([--enable-reserved-header-bits=BITS],
[reserve BITS (between 0 and 31) bits in block headers])],
[AS_CASE([$enable_reserved_header_bits],
[[[0-9]]|[[1-2]][[0-9]]|3[[0-1]]],
[ reserved_header_bits=$enable_reserved_header_bits],
[AC_MSG_ERROR([invalid argument to --enable-reserved-header-bits])])])
AC_ARG_ENABLE([stdlib-manpages],
[AS_HELP_STRING([--disable-stdlib-manpages],
[do not build or install the library man pages])])
AC_ARG_ENABLE([warn-error],
[AS_HELP_STRING([--enable-warn-error],
[treat C compiler warnings as errors])])
AC_ARG_VAR([WINDOWS_UNICODE_MODE],
[how to handle Unicode under Windows: ansi, compatible])
AC_ARG_ENABLE([force-safe-string], [],
[AS_IF([test "x$enableval" = 'xno'],
[AC_MSG_ERROR([Support for mutable strings was removed in OCaml 5.0.])])],
[])
AC_ARG_VAR([DEFAULT_STRING], [])
AS_IF([test x"$DEFAULT_STRING" = "xunsafe"],
[AC_MSG_ERROR([Support for mutable strings was removed in OCaml 5.0.])])
AC_ARG_ENABLE([flat-float-array],
[AS_HELP_STRING([--disable-flat-float-array],
[do not use flat float arrays])])
AC_ARG_ENABLE([function-sections],
[AS_HELP_STRING([--disable-function-sections],
[do not emit each function in a separate section])],
[],
[enable_function_sections=auto])
AC_ARG_ENABLE([mmap-map-stack],
[AS_HELP_STRING([--enable-mmap-map-stack],
[use mmap to allocate stacks instead of malloc])])
AC_ARG_WITH([afl],
[AS_HELP_STRING([--with-afl],
[use the AFL fuzzer])])
AC_ARG_WITH([flexdll],
[AS_HELP_STRING([--with-flexdll],
[bootstrap FlexDLL from the given sources])],
[AS_IF([test x"$withval" = 'xyes'],[with_flexdll=flexdll])])
AC_ARG_WITH([zstd],
[AS_HELP_STRING([--without-zstd],
[disable compression of marshaled data])])
AS_IF([test x"$enable_unix_lib" = "xno"],
[AS_IF([test x"$enable_ocamldebug" = "xyes"],
[AC_MSG_ERROR([ocamldebug requires the unix library])],
[enable_ocamldebug="no"])])
AS_IF([test x"$enable_unix_lib" = "xno" || test x"$enable_str_lib" = "xno"],
[AS_IF([test x"$enable_ocamldoc" = "xyes"],
[AC_MSG_ERROR([ocamldoc requires the unix and str libraries])],
[enable_ocamldoc="no"
build_ocamltex=false])],
[build_ocamltex=true])
# Initialization of libtool
# Allow the MSVC linker to be found even if ld isn't installed.
# User-specified LD still takes precedence.
AC_CHECK_TOOLS([LD],[ld link])
# libtool expects host_os=mingw for native Windows
# Also, it has been observed that, on some platforms (e.g. msvc) LT_INIT
# alters the CFLAGS variable, so we save its value before calling the macro
# and restore it after the call
old_host_os=$host_os
AS_IF([test x"$host_os" = "xwindows"],[host_os=mingw])
saved_CFLAGS="$CFLAGS"
LT_INIT
CFLAGS="$saved_CFLAGS"
host_os=$old_host_os
AS_CASE([$host],
[sparc-sun-solaris*],
[DEP_CC="false"],
[*-pc-windows],
[AC_CHECK_TOOLS(
[DEP_CC],
[$DEP_CC gcc cc x86_64-w64-mingw32-gcc i686-w64-mingw32-gcc],
[false])],
[DEP_CC="$CC"])
AS_CASE([$enable_dependency_generation],
[yes],
[AS_IF([test "$DEP_CC" = "false"],
[AC_MSG_ERROR(m4_normalize([The MSVC ports cannot generate dependency
information. Install gcc (or another CC-like compiler)]))],
[compute_deps=true])],
[no], [compute_deps=false],
[AS_IF([test -e .git],
[AS_IF([test "$DEP_CC" = "false"],
[compute_deps=false],
[compute_deps=true])],
[compute_deps=false])])
AS_CASE([$host],
# In config/Makefile.mingw*, we had:
# TARGET=i686-w64-mingw32 and x86_64-w64-mingw32
# TOOLPREF=$(TARGET)-
# ARCMD=$(TOOLPREF)ar
# However autoconf and libtool seem to use ar
# So we let them do, at the moment
[*-pc-windows],
[
mkexe_via_cc_extra_cmd=' && $(call MERGEMANIFESTEXE,$(1))'
libext=lib
AR=""
AS_IF([test "$host_cpu" = "x86_64" ],
[machine="-machine:AMD64 "],
[machine=""])
mklib="link -lib -nologo $machine /out:\$(1) \$(2)"
],
[
mklib="rm -f \$(1) && ${AR} rc \$(1) \$(2)"
])
## Find vendor of the C compiler
OCAML_CC_VENDOR
## In cross-compilation mode, can we run executables produced?
# At the moment, it's required, but the fact is used in C99 function detection
OCAML_HOST_IS_EXECUTABLE
# Determine how to call the C preprocessor directly.
# Most of the time, calling the C preprocessor through the C compiler is
# desirable and even important.
# In some cases, though, we want to use the C preprocessor only to
# expand macros. In such cases, it is much more convenient to be able
# to invoke it directly rather than through the C compiler, for instance
# because, when invoked directly, the C preprocessor does not require
# to be invoked on a file with a '.c' extension
# We thus figure out how to invoke the C preprocessor directly but
# let the CPP variable untouched, except for the MSVC port where we set it
# manually to make sure the backward compatibility is preserved
AS_CASE([$ocaml_cv_cc_vendor],
[xlc-*],
[CPP="$CC -E -qnoppline" # suppress incompatible XLC line directives
ocamltest_CPP="$CPP"],
[sunc-*],
[CPP="$CC -E -Qn" # suppress generation of Sun PRO ident string
ocamltest_CPP="$CPP"],
[msvc-*],
[CPP="$CC -nologo -EP"
ocamltest_CPP="$CPP 2>null"],
# TODO: why can we not use $CPP in multicore, fix this?
[CPP="$CC -E -P"
ocamltest_CPP="$CPP"])
# Absolute path to the toplevel source directory
# A sentinel character (X) is added at the end of the directory name
# and then removed, in case the directory name finishes with an odd character.
# (The $(...) construct strips trailing \n characters.)
# Also, it is important to use `printf` rather than `echo` because the
# behaviour of `echo` is indeterminate and uncontrollable if the
# absolute path contains backslashes, which will definitely be the case
# on Windows
# See https://lists.gnu.org/archive/html/autoconf/2019-07/msg00002.html
# for the detailed explanation.
ocamlsrcdir=$(unset CDPATH; cd -- "$srcdir" && printf %sX "$PWD") || fail
ocamlsrcdir=${ocamlsrcdir%X}
# Whether ar supports @FILE arguments
AS_CASE([lt_cv_ar_at_file],
[no], [ar_supports_response_files=false],
[ar_supports_response_files=true])
# Libraries to build depending on the host
AS_CASE([$host],
[*-*-mingw32*|*-pc-windows],
[unix_or_win32="win32"
ln='cp -pf'
ocamltest_libunix="Some false"
ocamlsrcdir="$(LC_ALL=C.UTF-8 cygpath -w -- "$ocamlsrcdir")"
ocamlyacc_wstr_module="yacc/wstr"],
[unix_or_win32="unix"
ln='ln -sf'
ocamltest_libunix="Some true"
ocamlyacc_wstr_module=""])
AS_CASE([$host],
[*-*-cygwin*|*-*-mingw32*|*-pc-windows],
[exeext=".exe"],
[exeext=''])
otherlibraries="dynlink runtime_events"
lib_dynlink=true
lib_runtime_events=true
AS_IF([test x"$enable_unix_lib" != "xno"],
[enable_unix_lib=yes
AC_CONFIG_FILES([otherlibs/unix/META])
otherlibraries="$otherlibraries unix"
lib_unix=true
AC_CONFIG_LINKS([
otherlibs/unix/unix.ml:otherlibs/unix/unix_${unix_or_win32}.ml
])
ocamltest_unix_impl="real"
ocamltest_unix_name="unix"
ocamltest_unix_path='$(ROOTDIR)/otherlibs/unix'
ocamltest_unix_include='-I $(ROOTDIR)/otherlibs/unix '],
[ocamltest_libunix="None"])
AS_IF([test x"$enable_str_lib" != "xno"],
[otherlibraries="$otherlibraries str"
lib_str=true
AC_CONFIG_FILES([otherlibs/str/META])])
# Checks for system services
## Test whether #! scripts are supported
## TODO: have two values, one for host and one for target
AC_SYS_INTERPRETER
long_shebang=false
AS_IF(
[test "x$interpval" = "xyes"],
[AS_CASE([$host],
[*-cygwin|*-*-mingw32*|*-pc-windows],
[shebangscripts=false],
[shebangscripts=true
prev_exec_prefix="$exec_prefix"
AS_IF([test "x$exec_prefix" = "xNONE"],[exec_prefix="$prefix"])
eval "expanded_bindir=\"$bindir\""
exec_prefix="$prev_exec_prefix"
# Assume maximum shebang is 128 chars; less #!, /ocamlrun, an optional
# 1 char suffix and the \0 leaving 115 characters
AS_IF([test "${#expanded_bindir}" -gt 115],[long_shebang=true])
]
)],
[shebangscripts=false]
)
# Are we building a cross-compiler
AS_IF(
[test x"$host" = x"$target"],
[cross_compiler=false],
[cross_compiler=true])
# Checks for programs
## Check for the C compiler: done by libtool
## AC_PROG_CC
## Check for C99 support: done by libtool
## AC_PROG_CC_C99
## Determine which flags to use for the C compiler
AS_CASE([$ocaml_cv_cc_vendor],
[xlc-*],
[outputobj='-o '
warn_error_flag=''
cc_warnings='-qflag=i:i'], # all warnings enabled
[sunc-*],
[outputobj='-o '; cc_warnings=""],
[msvc-*],
[outputobj='-Fo'
warn_error_flag='-WX'
cc_warnings=''],
[outputobj='-o '
warn_error_flag='-Werror'
cc_warnings="-Wall -Wint-conversion -Wstrict-prototypes \
-Wold-style-definition"])
AS_CASE([$enable_warn_error,OCAML__DEVELOPMENT_VERSION],
[yes,*|,true],
[cc_warnings="$cc_warnings $warn_error_flag"])
# We select high optimization levels, provided we can turn off:
# - strict type-based aliasing analysis (too risky for the OCaml runtime)
# - strict no-overflow conditions on signed integer arithmetic
# (the OCaml runtime assumes Java-style behavior of signed integer arith.)
# Concerning optimization level, -O3 is somewhat risky, so take -O2.
# Concerning language version, recent enough versions of GCC and Clang
# default to gnu11 (C11 + GNU extensions) or gnu17, which is fine.
# Note: the vendor macro can not recognize MinGW because it calls the
# C preprocessor directly so no compiler specific macro like __MING32__
# is defined. We thus catch MinGW first by looking at host and examine
# the vendor only as a fall-back. We could put tis part of the logic
# in the macro itself, too
AS_CASE([$host],
[*-*-mingw32*],
[AS_CASE([$ocaml_cv_cc_vendor],
[gcc-[[01234]]-*],
[AC_MSG_ERROR(m4_normalize([This version of MinGW-w64 GCC is too old.
Please use GCC version 5 or above.]))],
[gcc-*],
[internal_cflags="-Wno-unused $cc_warnings \
-fexcess-precision=standard"
# TODO: see whether the code can be fixed to avoid -Wno-unused
common_cflags="-O2 -fno-strict-aliasing -fwrapv -mms-bitfields"
internal_cppflags='-D__USE_MINGW_ANSI_STDIO=0 -DUNICODE -D_UNICODE'
internal_cppflags="$internal_cppflags -DWINDOWS_UNICODE="
internal_cppflags="${internal_cppflags}\$(WINDOWS_UNICODE)"],
[AC_MSG_ERROR([Unsupported C compiler for a MinGW-w64 build])])],
[AS_CASE([$ocaml_cv_cc_vendor],
[clang-*],
[common_cflags="-O2 -fno-strict-aliasing -fwrapv";
internal_cflags="$cc_warnings -fno-common"],
[gcc-[[0123]]-*|gcc-4-[[0-8]]],
# No C11 support
[AC_MSG_ERROR(m4_normalize([This version of GCC is too old.
Please use GCC version 4.9 or above.]), 69)],
[gcc-*],
[common_cflags="-O2 -fno-strict-aliasing -fwrapv";
internal_cflags="$cc_warnings -fno-common -fexcess-precision=standard \
-Wvla"],
[msvc-*],
[common_cflags="-nologo -O2 -Gy- -MD $cc_warnings"
common_cppflags="-D_CRT_SECURE_NO_DEPRECATE"
internal_cppflags='-DUNICODE -D_UNICODE'
OCAML_CL_HAS_VOLATILE_METADATA
AS_IF([test "x$cl_has_volatile_metadata" = "xtrue"],
[internal_cflags='-d2VolatileMetadata-'])
internal_cppflags="$internal_cppflags -DWINDOWS_UNICODE="
internal_cppflags="${internal_cppflags}\$(WINDOWS_UNICODE)"],
[xlc-*],
[common_cflags="-O5 -qtune=balanced -qnoipa -qinline";
internal_cflags="$cc_warnings"],
[sunc-*], # Optimization should be >= O4 to inline functions
# and prevent unresolved externals
[common_cflags="-O4 -xc99=all -D_XPG6 $CFLAGS";
internal_cflags="$cc_warnings"],
[common_cflags="-O"])])
# Enable SSE2 on x86 mingw to avoid using 80-bit registers.
AS_CASE([$host],
[i686-*-mingw32*],
[internal_cflags="$internal_cflags -mfpmath=sse -msse2"])
# Use 64-bit file offset if possible
# See also AC_SYS_LARGEFILE
# Problem: flags are added to CC rather than CPPFLAGS
AS_CASE([$host],
[*-*-mingw32*|*-pc-windows], [],
[common_cppflags="$common_cppflags -D_FILE_OFFSET_BITS=64"])
# Adjust according to target
# On Windows we do not take $enable_shared because it does not seem
# to work. This should be better understood later
#AS_CASE([$target],
# [*-pc-windows],
# [enable_shared=yes])
AS_IF([test x"$enable_shared" = "xno"],
[supports_shared_libraries=false
AS_CASE([$host],
[*-pc-windows|*-w64-mingw32*],
[AC_MSG_ERROR([Cannot build native Win32 with --disable-shared])])],
[supports_shared_libraries=true])
# Define flexlink chain and flags correctly for the different Windows ports
flexlink_flags=''
AS_CASE([$host],
[i686-*-cygwin],
[flexdll_chain='cygwin'
flexlink_flags='-merge-manifest -stack 16777216'],
[x86_64-*-cygwin],
[flexdll_chain='cygwin64'
flexlink_flags='-merge-manifest -stack 16777216'],
[*-*-cygwin*],
[AC_MSG_ERROR([unknown cygwin variant])],
[i686-w64-mingw32*],
[flexdll_chain='mingw'
flexlink_flags='-stack 16777216'],
[x86_64-w64-mingw32*],
[flexdll_chain='mingw64'
flexlink_flags='-stack 33554432'],
[i686-pc-windows],
[flexdll_chain='msvc'
flexlink_flags='-merge-manifest -stack 16777216'],
[x86_64-pc-windows],
[flexdll_chain='msvc64'
flexlink_flags='-merge-manifest -stack 33554432'],
[flexdll_chain=''])
AS_IF([test x"$supports_shared_libraries" != 'xfalse'], [
AC_MSG_CHECKING([for flexdll sources])
AS_IF([test x"$with_flexdll" = "xno"],
[flexdll_source_dir=''
AC_MSG_RESULT([disabled])],
[flexmsg=''
AS_CASE([$target],
[*-*-cygwin*|*-w64-mingw32*|*-pc-windows],
[dnl When bootstrapping from the git submodule (flexdll directory), just
dnl use that, however if another directory has been specified with
dnl --with-flexdll=<path> then copy the contents of <path> to
dnl flexdll-sources. This allows us to guarantee that flexdll is always
dnl built at one directory level below the root, so we can specify
dnl ROOTDIR=..
AS_IF([m4_normalize([test x"$with_flexdll" = 'x'
|| test x"$with_flexdll" = 'xflexdll'])],
[AS_IF([test -f 'flexdll/flexdll.h'],
[flexdll_source_dir=flexdll
iflexdir='$(ROOTDIR)/flexdll'
with_flexdll="$iflexdir"],
[AS_IF([test x"$with_flexdll" != 'x'],
[AC_MSG_RESULT([requested but not available])
AC_MSG_ERROR([exiting])])])],
[rm -rf flexdll-sources
AS_IF([test -f "$with_flexdll/flexdll.h"],
[mkdir -p flexdll-sources
cp -r "$with_flexdll"/* flexdll-sources/
flexdll_source_dir='flexdll-sources'
iflexdir='$(ROOTDIR)/flexdll-sources'
flexmsg=" (from $with_flexdll)"],
[AC_MSG_RESULT([requested but not available])
AC_MSG_ERROR([exiting])])])
AS_IF([test x"$flexdll_source_dir" = 'x'],
[AC_MSG_RESULT([no])],
[AC_MSG_RESULT([$iflexdir$flexmsg])
bootstrapping_flexdll=true
flexdll_dir=\"+flexdll\"
# The submodule should be searched *before* any other -I paths
internal_cppflags="-I $iflexdir $internal_cppflags"])],
[AS_IF([test x"$with_flexdll" != 'x'],
[AC_MSG_RESULT([requested but not supported])
AC_MSG_ERROR([exiting])])])])
AC_CHECK_PROG([flexlink],[flexlink],[flexlink])
AS_IF([test -n "$flexlink" && test -z "$flexdll_source_dir"],[
OCAML_TEST_FLEXLINK([$flexlink], [$flexdll_chain],
[$internal_cppflags], [$host])
AS_CASE([$host],
[*-w64-mingw32*|*-pc-windows],
[flexlink_where="$(cmd /c "$flexlink" -where 2>/dev/null)"
AS_IF([test -z "$flexlink_where"],
[AC_MSG_ERROR([$flexlink is not executable from a native Win32 process])
])])
])
OCAML_TEST_FLEXDLL_H([$flexdll_source_dir])
AS_IF([test -n "$flexlink" && test x"$have_flexdll_h" = 'xno'],
[OCAML_TEST_FLEXLINK_WHERE([$flexlink])
AS_IF([test "x$have_flexdll_h" = 'xyes'],
[internal_cppflags="$internal_cppflags -I \"$flexlink_where\""])
])
])
AS_CASE([$have_flexdll_h,$supports_shared_libraries,$host],
[no,true,*-*-cygwin*],
[supports_shared_libraries=false
AC_MSG_WARN([flexdll.h not found: shared library support disabled.])],
[no,*,*-w64-mingw32*|no,*,*-pc-windows],
[AC_MSG_ERROR([flexdll.h is required for native Win32])])
AS_CASE([$flexdll_source_dir,$supports_shared_libraries,$flexlink,$host],
[,true,,*-*-cygwin*],
[supports_shared_libraries=false
AC_MSG_WARN([flexlink not found: shared library support disabled.])],
[,*,,*-w64-mingw32*|,*,,*-pc-windows],
[AC_MSG_ERROR([flexlink is required for native Win32])])
mkexe_cmd_exp="$CC"
AS_CASE([$cc_basename,$host],
[*,x86_64-*-darwin*],
[oc_ldflags='-Wl,-no_compact_unwind';
AC_DEFINE([HAS_ARCH_CODE32], [1])],
[*,aarch64-*-darwin*|arm64-*-darwin*],
AC_DEFINE([HAS_ARCH_CODE32], [1]),
[*,*-*-cygwin*],
[common_cppflags="$common_cppflags -U_WIN32"
AS_IF([$supports_shared_libraries],
[mkexe_cmd_exp="flexlink -exe -chain ${flexdll_chain} ${flexlink_flags}"
mkexe_cmd="flexlink -exe -chain ${flexdll_chain} ${flexlink_flags}"
mkexe_cflags=''
mkexe_ldflags_prefix='-link '],
[mkexe_extra_flags=''
oc_ldflags='-Wl,--stack,16777216']
)
ostype="Cygwin"],
[*,*-*-mingw32*],
[AS_CASE([$host],
[i686-*-*], [oc_dll_ldflags="-static-libgcc"])
ostype="Win32"
toolchain="mingw"
mkexe_cmd_exp="flexlink -exe -chain ${flexdll_chain} ${flexlink_flags}"
mkexe_cmd="flexlink -exe -chain ${flexdll_chain} ${flexlink_flags}"
mkexe_cflags=''
mkexe_ldflags_prefix='-link '
oc_exe_ldflags='-municode'
mkexe_extra_flags="$mkexe_ldflags_prefix$oc_exe_ldflags"
SO="dll"],
[*,*-pc-windows],
[toolchain=msvc
ostype="Win32"
mkexe_cmd_exp="flexlink -exe -chain ${flexdll_chain} ${flexlink_flags}"
mkexe_cmd="flexlink -exe -chain ${flexdll_chain} ${flexlink_flags}"
mkexe_cflags=''
mkexe_ldflags_prefix='-link '
mkexe_via_cc_ldflags_prefix='/link '
oc_exe_ldflags='/ENTRY:wmainCRTStartup'
mkexe_extra_flags="$mkexe_ldflags_prefix$oc_exe_ldflags"
mkexedebugflag=''],
[*,x86_64-*-linux*],
AC_DEFINE([HAS_ARCH_CODE32], [1]),
[xlc*,powerpc-ibm-aix*],
[oc_ldflags='-brtl -bexpfull'
AC_DEFINE([HAS_ARCH_CODE32], [1])],
[gcc*,powerpc-*-linux*],
[oc_ldflags="-mbss-plt"])
## Program to use to install files
AC_PROG_INSTALL
# Checks for libraries
## Mathematical library
AC_SEARCH_LIBS([cos], [m],
[AS_CASE([$ac_cv_search_cos],
[no], [AC_MSG_ERROR([Could not locate C math functions])],
['none required'], [mathlib=""],
[mathlib="$ac_cv_search_cos"])])
# Checks for header files