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libopts.m4
(20.07 KB)
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liboptschk.m4
(781 B)
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stdnoreturn.m4
(1.43 KB)
Editing: stdnoreturn.m4
# Check for stdnoreturn.h that conforms to C11. dnl Copyright 2012-2015 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. # Prepare for substituting <stdnoreturn.h> if it is not supported. AC_DEFUN([gl_STDNORETURN_H], [ AC_CACHE_CHECK([for working stdnoreturn.h], [gl_cv_header_working_stdnoreturn_h], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <stdlib.h> #include <stdnoreturn.h> /* Do not check for 'noreturn' after the return type. C11 allows it, but it's rarely done that way and circa-2012 bleeding-edge GCC rejects it when given -Werror=old-style-declaration. */ noreturn void foo1 (void) { exit (0); } _Noreturn void foo2 (void) { exit (0); } int testit (int argc, char **argv) { if (argc & 1) return 0; (argv[0][0] ? foo1 : foo2) (); } ]])], [gl_cv_header_working_stdnoreturn_h=yes], [gl_cv_header_working_stdnoreturn_h=no])]) if test $gl_cv_header_working_stdnoreturn_h = yes; then STDNORETURN_H='' else STDNORETURN_H='stdnoreturn.h' fi AC_SUBST([STDNORETURN_H]) AM_CONDITIONAL([GL_GENERATE_STDNORETURN_H], [test -n "$STDNORETURN_H"]) ])
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