From 69e2af495d0063ff247abeecbc198a8544be220b Mon Sep 17 00:00:00 2001
From: RichardG867 <richardg867@gmail.com>
Date: Wed, 23 Oct 2024 11:22:17 -0300
Subject: [PATCH] pcireg: Make Linux port official

---
 .github/workflows/build.yml | 12 +++++++++++-
 clib/gcc.mk                 |  5 +++--
 pcireg/Makefile.gcc         |  2 +-
 pcireg/README.md            |  6 +++++-
 4 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2cb31ea..2813acf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Install build tools
-        run: sudo apt update && sudo apt install build-essential xz-utils
+        run: sudo apt update && sudo apt install build-essential crossbuild-essential-i386 xz-utils
       - name: Download OpenWatcom
         if: steps.cache.outputs.cache-hit != 'true'
         run: |
@@ -23,6 +23,14 @@ jobs:
           mkdir /opt/watcom
           wget -qO- https://github.com/open-watcom/open-watcom-v2/releases/download/2023-12-01-Build/ow-snapshot.tar.xz | tar -Jxv -C /opt/watcom
           echo "/opt/watcom/binl64:/opt/watcom/binl" >> $GITHUB_PATH
+      - name: Download and build libpci
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: |
+          rm -rf /opt/pciutils-*
+          wget -qO- https://github.com/pciutils/pciutils/releases/download/v3.13.0/pciutils-3.13.0.tar.gz | tar -zxv -C /opt
+          cd /opt/pciutils-*
+          make CC=i686-linux-gnu-gcc ZLIB=no DNS=no SHARED=no
+          sudo make install-lib
       - uses: actions/checkout@v2
       - name: Build `cp437`
         run: |
@@ -49,6 +57,7 @@ jobs:
           cd ${{ github.workspace }}/pcireg
           wmake
           make -f Makefile.uefi ARCH=x86_64
+          make -f Makefile.gcc CC=i686-linux-gnu-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static
           python3 pciids.py
       - name: Build `usblgoff`
         run: |
@@ -60,6 +69,7 @@ jobs:
           path: |
             **/*.EXE
             **/*.EFI
+            pcireg/pcireg
             **/*.BIN
             ac97/*.md
             acpi/*.md
diff --git a/clib/gcc.mk b/clib/gcc.mk
index ffe993d..c3b799e 100644
--- a/clib/gcc.mk
+++ b/clib/gcc.mk
@@ -16,14 +16,15 @@
 #
 
 VPATH		= . ../clib
+CC			?= "gcc"
 
 default: $(DEST)
 
 %.o: %.c $(HEADERS)
-	gcc -I../clib -c $< -o $@
+	$(CC) -I../clib $(CFLAGS) -c $< -o $@
 
 $(DEST): $(OBJS)
-	gcc $(OBJS) $(CFLAGS) -o $@
+	$(CC) $(OBJS) $(LDFLAGS) -o $@
 	chmod +x $@ || true
 
 clean:
diff --git a/pcireg/Makefile.gcc b/pcireg/Makefile.gcc
index ca90e78..69d1e85 100644
--- a/pcireg/Makefile.gcc
+++ b/pcireg/Makefile.gcc
@@ -17,6 +17,6 @@
 
 export OBJS	= pcireg.o clib_pci.o clib_std.o clib_sys.o clib_term.o
 export DEST	= pcireg
-export CFLAGS	= -lpci
+override LDFLAGS	+= -lpci
 
 include ../clib/gcc.mk
diff --git a/pcireg/README.md b/pcireg/README.md
index 433b744..0803056 100644
--- a/pcireg/README.md
+++ b/pcireg/README.md
@@ -1,6 +1,6 @@
 pcireg
 ======
-DOS and UEFI tool for reading, writing and dumping PCI configuration space registers; scanning the PCI bus; and more.
+DOS, UEFI and Linux tool for reading, writing and dumping PCI configuration space registers; scanning the PCI bus; and more.
 
 Usage
 -----
@@ -42,6 +42,10 @@ Building
 * **Linux:** Run `make -f Makefile.uefi ARCH=x86_64` with a GCC toolchain installed.
   * Note that 32-bit UEFI targets are not supported yet.
 
+### Linux target
+
+* **Linux:** Run `make -f Makefile.gcc` with a GCC toolchain and development files for `libpci` installed.
+
 ### PCI ID database
 
 * Run `python3 pciids.py` to update the `PCIIDS.BIN` file.