Package fftw3 was not found in the pkg-config search path.

[natyfp]

I'm trying to deploy on Posit an app using this library, but I'm getting the error: Package fftw3 was not found in the pkg-config search path.

[natyfp]

This is the whole error:

curl: HTTP 200 https://cran.rstudio.com/src/contrib/fftwtools_0.9-11.tar.gz
01/18 18:15:24.580 (GMT)
[1] "Command failed (1)\n\nFailed to run system command:\n\n\t'/opt/R/4.2.1/lib/R/bin/R' --vanilla CMD INSTALL --preclean '/opt/rstudio-connect/mnt/tmp/Rtmpr8s227/packrat-install-6ea0f5060f6c8/fftwtools' --library='/opt/rstudio-connect/mnt/app/packrat/lib/x86_64-pc-linux-gnu/4.2.1' --install-tests --no-docs --no-multiarch --no-demo \n\nThe command failed with output:\n* installing source package ‘fftwtools’ ...\n** package ‘fftwtools’ successfully unpacked and MD5 sums checked\n** using staged installation\nchecking for gcc... gcc\nchecking whether the C compiler works... yes\nchecking for C compiler default output file name... a.out\nchecking for suffix of executables... \nchecking whether we are cross compiling... no\nchecking for suffix of object files... o\nchecking whether we are using the GNU C compiler... yes\nchecking whether gcc accepts -g... yes\nchecking for gcc option to accept ISO C89... none needed\nchecking how to run the C preprocessor... gcc -E\ncheckin
g for gcc... (cached) gcc\nchecking whether we are using the GNU C compiler... (cached) yes\nchecking whether gcc accepts -g... (cached) yes\nchecking for gcc option to accept ISO C89... (cached) none needed\nchecking for pkg-config... yes\nPackage fftw3 was not found in the pkg-config search path.\nPerhaps you should add the directory containing fftw3.pc'\nto the PKG_CONFIG_PATH environment variable\nNo package 'fftw3' found\nPackage fftw3 was not found in the pkg-config search path.\nPerhaps you should add the directory containing fftw3.pc'\nto the PKG_CONFIG_PATH environment variable\nNo package 'fftw3' found\nconfigure: creating ./config.status\nconfig.status: creating src/Makevars\n\nfftwtools 0.9-10\n================\n\ncompiler flags: \nlink argument: \n\n** libs\ngcc -I"/opt/R/4.2.1/lib/R/include" -DNDEBUG -I/usr/local/include -fpic -g -O2 -c fftwtools.c -o fftwtools.o\nfftwtools.c:28:9: fatal error: fftw3.h: No such file or directory\n 28 | #include<fftw3.h>\n | ^~~~~~~~~
ncompilation terminated.\nmake: *** [/opt/R/4.2.1/lib/R/etc/Makeconf:168: fftwtools.o] Error 1\nERROR: compilation failed for package ‘fftwtools’\n* removing ‘/opt/rstudio-connect/mnt/app/packrat/lib/x86_64-pc-linux-gnu/4.2.1/fftwtools’"
01/18 18:15:24.582 (GMT)
Error: Command failed (1)
01/18 18:15:24.582 (GMT)
01/18 18:15:24.582 (GMT)
Failed to run system command:
01/18 18:15:24.582 (GMT)
01/18 18:15:24.582 (GMT)
'/opt/R/4.2.1/lib/R/bin/R' --vanilla CMD INSTALL --preclean '/opt/rstudio-connect/mnt/tmp/Rtmpr8s227/packrat-install-6ea0f5060f6c8/fftwtools' --library='/opt/rstudio-connect/mnt/app/packrat/lib/x86_64-pc-linux-gnu/4.2.1' --install-tests --no-docs --no-multiarch --no-demo
01/18 18:15:24.582 (GMT)
01/18 18:15:24.582 (GMT)
The command failed with output:
01/18 18:15:24.582 (GMT)

• installing source package ‘fftwtools’ ...
  01/18 18:15:24.582 (GMT)
  ** package ‘fftwtools’ successfully unpacked and MD5 sums checked
  01/18 18:15:24.582 (GMT)
  ** using staged installation
  01/18 18:15:24.582 (GMT)
  checking for gcc... gcc
  01/18 18:15:24.582 (GMT)
  checking whether the C compiler works... yes
  01/18 18:15:24.582 (GMT)
  checking for C compiler default output file name... a.out
  01/18 18:15:24.582 (GMT)
  checking for suffix of executables...
  01/18 18:15:24.582 (GMT)
  checking whether we are cross compiling... no
  01/18 18:15:24.582 (GMT)
  checking for suffix of object files... o
  01/18 18:15:24.582 (GMT)
  checking whether we are using the GNU C compiler... yes
  01/18 18:15:24.582 (GMT)
  checking whether gcc accepts -g... yes
  01/18 18:15:24.582 (GMT)
  checking for gcc option to accept ISO C89... none needed
  01/18 18:15:24.582 (GMT)
  checking how to run the C preprocessor... gcc -E
  01/18 18:15:24.582 (GMT)
  checking for gcc... (cached) gcc
  01/18 18:15:24.582 (GMT)
  checking whether we are using the GNU C compiler... (cached) yes
  01/18 18:15:24.582 (GMT)
  checking whether gcc accepts -g... (cached) yes
  01/18 18:15:24.582 (GMT)
  checking for gcc option to accept ISO C89... (cached) none needed
  01/18 18:15:24.582 (GMT)
  checking for pkg-config... yes
  01/18 18:15:24.582 (GMT)
  Package fftw3 was not found in the pkg-config search path.
  01/18 18:15:24.582 (GMT)
  Perhaps you should add the directory containing `fftw3.pc'
  01/18 18:15:24.582 (GMT)
  to the PKG_CONFIG_PATH environment variable
  01/18 18:15:24.582 (GMT)
  No package 'fftw3' found
  01/18 18:15:24.582 (GMT)
  Package fftw3 was not found in the pkg-config search path.