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Candidate multilib: .;@m64
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/var/tmp/portage/sci-libs/plplot-5.15.0-r103/work/plplot-5.15.0/cmake/modules/TestForHighBitCharacters.c:20:8: error: call to undeclared library function 'exit' with type 'void (int) __attribute__((noreturn))'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
       exit(1);
       ^
/var/tmp/portage/sci-libs/plplot-5.15.0-r103/work/plplot-5.15.0/cmake/modules/TestForHighBitCharacters.c:20:8: note: include the header <stdlib.h> or explicitly provide a declaration for 'exit'






/var/tmp/portage/sci-libs/plplot-5.15.0-r103/work/plplot-5.15.0_build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: 'crt_externs.h' file not found
#include <crt_externs.h>
         ^~~~~~~~~~~~~~~




/var/tmp/portage/sci-libs/plplot-5.15.0-r103/work/plplot-5.15.0/cmake/modules/TestSignalType.c:9:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
void (*signal ()) ();
       ^
/usr/include/signal.h:88:23: note: conflicting prototype is here
extern __sighandler_t signal (int __sig, __sighandler_t __handler)
                      ^
















/usr/bin/x86_64-pc-linux-gnu-ld: CMakeFiles/cmTC_b3c83.dir/CheckFunctionExists.c.o: in function `main':
CheckFunctionExists.c:(.text+0x9): undefined reference to `_NSGetArgc'
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)











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/usr/bin/x86_64-pc-linux-gnu-ld: CMakeFiles/cmTC_de192.dir/TestForNamespace.cxx.o: in function `_GLOBAL__sub_I_TestForNamespace.cxx':
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/usr/bin/x86_64-pc-linux-gnu-ld: TestForNamespace.cxx:(.text.startup+0x13): undefined reference to `std::ios_base::Init::~Init()'
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)