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37 lines
889 B
Plaintext
37 lines
889 B
Plaintext
dnl ######################################################################
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dnl find if "extern char *optarg" exists in headers
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AC_DEFUN([AMU_EXTERN_OPTARG],
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[
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AC_CACHE_CHECK(if external definition for optarg[] exists,
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ac_cv_extern_optarg,
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[
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# try to compile program that uses the variable
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AC_TRY_COMPILE(
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[
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#ifdef HAVE_STDIO_H
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# include <stdio.h>
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#endif /* HAVE_STDIO_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif /* HAVE_STDLIB_H */
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#ifdef HAVE_SYS_ERRNO_H
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# include <sys/errno.h>
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#endif /* HAVE_SYS_ERRNO_H */
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#ifdef HAVE_ERRNO_H
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# include <errno.h>
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#endif /* HAVE_ERRNO_H */
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],
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[
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char *cp = optarg;
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], ac_cv_extern_optarg=yes, ac_cv_extern_optarg=no)
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])
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if test "$ac_cv_extern_optarg" = yes
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then
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AC_DEFINE(HAVE_EXTERN_OPTARG)
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fi
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])
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dnl ======================================================================
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