[MacPorts] #61975: codec2 @20210101-1f701514 fails to build using Xcode 12 due to implicitly declared library functions

[MacPorts]

#61975: codec2 @20210101-1f701514 fails to build using Xcode 12 due to implicitly
declared library functions
-----------------------+--------------------
 Reporter:  michaelld  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:             |       Port:  codec2
-----------------------+--------------------
 From the build log:
 {{{
 :info:build
 /opt/local/var/macports/build/_opt_sources_MacPorts_ports_github_macports_audio_codec2/codec2/work/codec2-1f70151444f9add31848905946abcf2dd12d5c0e/src/c2dec.c:114:13:
 warning: unused variable 'nread' [-Wunused-variable]
 :info:build         int nread = fread(&in_hdr,sizeof(in_hdr),1,fin);
 :info:build             ^
 :info:build /usr/bin/clang -pipe -Os -DNDEBUG -I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -Wall
 -Wno-strict-overflow -std=gnu11 -fPIC -arch x86_64 -isysroot
 /Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -mmacosx-version-
 min=11.0 -Wl,-search_paths_first -Wl,-headerpad_max_install_names
 -L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk
 CMakeFiles/vhf_frame_c2.dir/vhf_frame_c2.c.o -o vhf_frame_c2
 -Wl,-rpath,/opt/local/lib -lm libcodec2.0.9.dylib -lm
 :info:build
 /opt/local/var/macports/build/_opt_sources_MacPorts_ports_github_macports_audio_codec2/codec2/work/codec2-1f70151444f9add31848905946abcf2dd12d5c0e/src/fmfsk_mod.c:47:9:
 error: implicitly declaring library function 'exit' with type 'void (int)
 __attribute__((noreturn))' [-Werror,-Wimplicit-function-declaration]
 :info:build         exit(1);
 :info:build         ^
 :info:build
 /opt/local/var/macports/build/_opt_sources_MacPorts_ports_github_macports_audio_codec2/codec2/work/codec2-1f70151444f9add31848905946abcf2dd12d5c0e/src/fmfsk_mod.c:47:9:
 note: include the header <stdlib.h> or explicitly provide a declaration
 for 'exit'
 :info:build /usr/bin/clang -pipe -Os -DNDEBUG -I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -Wall
 -Wno-strict-overflow -std=gnu11 -fPIC -arch x86_64 -isysroot
 /Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk -mmacosx-version-
 min=11.0 -Wl,-search_paths_first -Wl,-headerpad_max_install_names
 -L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk
 CMakeFiles/cohpsk_get_test_bits.dir/cohpsk_get_test_bits.c.o -o
 cohpsk_get_test_bits  -Wl,-rpath,/opt/local/lib -lm libcodec2.0.9.dylib
 -lm
 :info:build
 /opt/local/var/macports/build/_opt_sources_MacPorts_ports_github_macports_audio_codec2/codec2/work/codec2-1f70151444f9add31848905946abcf2dd12d5c0e/src/fmfsk_mod.c:51:10:
 error: implicit declaration of function 'atoi' is invalid in C99 [-Werror
 ,-Wimplicit-function-declaration]
 :info:build     Fs = atoi(argv[1]);
 :info:build          ^
 :info:build
 /opt/local/var/macports/build/_opt_sources_MacPorts_ports_github_macports_audio_codec2/codec2/work/codec2-1f70151444f9add31848905946abcf2dd12d5c0e/src/fmfsk_mod.c:76:24:
 error: implicitly declaring library function 'alloca' with type 'void
 *(unsigned long)' [-Werror,-Wimplicit-function-declaration]
 :info:build     bitbuf = (uint8_t*)alloca(sizeof(uint8_t)*fmfsk->nbit);
 :info:build                        ^
 :info:build
 /opt/local/var/macports/build/_opt_sources_MacPorts_ports_github_macports_audio_codec2/codec2/work/codec2-1f70151444f9add31848905946abcf2dd12d5c0e/src/fmfsk_mod.c:76:24:
 note: include the header <stdlib.h> or explicitly provide a declaration
 for 'alloca'
 :info:build 3 errors generated.
 }}}

 Good chance there will be more of these in files further into the build.

-- 
Ticket URL: <https://trac.macports.org/ticket/61975>
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