./configure
...
checking for gcc option to accept ISO C99... unsupported
configure: error: C compiler "gcc" does not support C99
When I do gcc --version I see:
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/usr/include/c++/4.2.1
Apple clang version 13.0.0 (clang-1300.0.27.3)
Target: x86_64-apple-darwin21.2.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
So, it looks like it is using clang to compile and not gcc.
configure runs successfully if I do: ./configure CC=gcc-11 or soft link gcc to gcc-11 and then run configure. However, I didn't find these tips in Platform specific notes in docs: https://www.postgresql.org/docs/9.6/installation-platform-notes.html#INSTALLATION-NOTES-MACOS.
So, I wanted to ask if this behavior is expected and if so, should we update docs to make a note of this?
Regards,
Samay
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