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53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
# Local additions to Autoconf macros.
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# Copyright (C) 1992, 1994 Free Software Foundation, Inc.
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# Francois Pinard <pinard@iro.umontreal.ca>, 1992.
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# @defmac fp_PROG_CC_STDC
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# @maindex PROG_CC_STDC
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# @ovindex CC
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# If the C compiler in not in ANSI C mode by default, try to add an option
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# to output variable @code{CC} to make it so. This macro tries various
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# options that select ANSI C on some system or another. It considers the
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# compiler to be in ANSI C mode if it defines @code{__STDC__} to 1 and
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# handles function prototypes correctly.
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#
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# If you use this macro, you should check after calling it whether the C
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# compiler has been set to accept ANSI C; if not, the shell variable
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# @code{fp_cv_prog_cc_stdc} is set to @samp{no}. If you wrote your source
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# code in ANSI C, you can make an un-ANSIfied copy of it by using the
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# program @code{ansi2knr}, which comes with Ghostscript.
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# @end defmac
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define(fp_PROG_CC_STDC,
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[AC_CACHE_CHECK(for ${CC-cc} option to accept ANSI C,
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fp_cv_prog_cc_stdc,
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[fp_cv_prog_cc_stdc=no
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ac_save_CFLAGS="$CFLAGS"
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# Don't try gcc -ansi; that turns off useful extensions and
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# breaks some systems' header files.
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# AIX -qlanglvl=ansi
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# Ultrix and OSF/1 -std1
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# HP-UX -Aa -D_HPUX_SOURCE
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# SVR4 -Xc
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for ac_arg in "" -qlanglvl=ansi -std1 "-Aa -D_HPUX_SOURCE" -Xc
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do
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CFLAGS="$ac_save_CFLAGS $ac_arg"
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AC_TRY_COMPILE(
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[#ifndef __STDC__
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choke me
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#endif
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], [int test (int i, double x);
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struct s1 {int (*f) (int a);};
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struct s2 {int (*f) (double a);};],
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[fp_cv_prog_cc_stdc="$ac_arg"; break])
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done
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CFLAGS="$ac_save_CFLAGS"
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])
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case "x$fp_cv_prog_cc_stdc" in
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x|xno) ;;
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*) CC="$CC $fp_cv_prog_cc_stdc" ;;
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esac
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])
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builtin(include, aczsh.m4)
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