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For a long time I have been trying to compile and run c programs on my MacBook Pro running macOS Catalina, I’ve tried compiling with cc, gcc and clang and the compilation seems to work just fine but every time I run the .out file my Mac freezes, I can’t control+c out of the application and even if I terminate the terminal the issue continues with the finder app (it completely stops responding), so in order to fix the problem I have to completely shut the computer off and then turn it on again via the power button. This issue happens with every program that I have tried, including the “hello, world” program.

I have compiled a minimal test with gcc -v -o demo demo.c and the output is:

Apple clang version 11.0.3 (clang-1103.0.32.62)
Target: x86_64-apple-darwin19.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
 "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.15.0 -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name demo.c -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=all -fno-strict-return -masm-verbose -munwind-tables -target-sdk-version=10.15.4 -target-cpu penryn -dwarf-column-info -debugger-tuning=lldb -target-linker-version 556.6 -v -resource-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.3 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -I/usr/local/include -internal-isystem /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include -internal-isystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.3/include -internal-externc-isystem /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -internal-externc-isystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -Wno-objc-signed-char-bool-implicit-int-conversion -Wno-extra-semi-stmt -Wno-quoted-include-in-framework-header -fdebug-compilation-dir /Users/user -ferror-limit 19 -fmessage-length 80 -stack-protector 1 -fstack-check -mdarwin-stkchk-strong-link -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fobjc-runtime=macosx-10.15.0 -fmax-type-align=16 -fdiagnostics-show-option -fcolor-diagnostics -o /var/folders/xj/rw_jny791d9c83w_rplgscnw0000gn/T/demo-635cdc.o -x c demo.c
clang -cc1 version 11.0.3 (clang-1103.0.32.62) default target x86_64-apple-darwin19.4.0
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include"
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.3/include
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
End of search list.
 "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -lto_library /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib -no_deduplicate -dynamic -arch x86_64 -platform_version macos 10.15.0 10.15.4 -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -o demo /var/folders/xj/rw_jny791d9c83w_rplgscnw0000gn/T/demo-635cdc.o -L/usr/local/lib -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.3/lib/darwin/libclang_rt.osx.a
David Ranieri
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  • So it does this even with a "Hello World" program? _"the issue continues with the finder"_, what is this supposed to mean? Please [edit] and elaborate. – Jabberwocky May 29 '20 at 06:10
  • Compile a "helloworld.c" with `gcc -v -o helloworld helloworld.c` and paste here the output, maybe we can see something suspicious. – David Ranieri May 29 '20 at 06:20
  • For completeness: `int main(void) { puts("Hi"); return 0; }` – pmg May 29 '20 at 06:27
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    Searching your message complaining about `ignoring nonexistent directory "/Applications/Xcode.app/...` in Google I have found [Can't compile a C program on a Mac after upgrading to Catalina 10.15](https://stackoverflow.com/questions/58278260/cant-compile-a-c-program-on-a-mac-after-upgrading-to-catalina-10-15). – David Ranieri May 29 '20 at 06:42
  • @GiotlabOffice please put all relevant information __into the question__. You can [edit] your question. – Jabberwocky May 29 '20 at 06:45
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    Thank you @DavidRanieri, you’ve solved my issue. – Giotlab Office May 29 '20 at 06:50
  • @GiotlabOffice I'm glad to hear that – David Ranieri May 29 '20 at 06:51

1 Answers1

2

The solution was to run this command:

export CPATH=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/

For anyone else that experiences this issue, please see discussion at: Can't compile a C program on a Mac after upgrading to Catalina 10.15

David Ranieri
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Giotlab Office
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