1# Local additions to Autoconf macros. 2# Copyright (C) 1992, 1994 Free Software Foundation, Inc. 3# Francois Pinard <pinard@iro.umontreal.ca>, 1992. 4 5# @defmac fp_PROG_CC_STDC 6# @maindex PROG_CC_STDC 7# @ovindex CC 8# If the C compiler in not in ANSI C mode by default, try to add an option 9# to output variable @code{CC} to make it so. This macro tries various 10# options that select ANSI C on some system or another. It considers the 11# compiler to be in ANSI C mode if it defines @code{__STDC__} to 1 and 12# handles function prototypes correctly. 13# 14# If you use this macro, you should check after calling it whether the C 15# compiler has been set to accept ANSI C; if not, the shell variable 16# @code{fp_cv_prog_cc_stdc} is set to @samp{no}. If you wrote your source 17# code in ANSI C, you can make an un-ANSIfied copy of it by using the 18# program @code{ansi2knr}, which comes with Ghostscript. 19# @end defmac 20 21define(fp_PROG_CC_STDC, 22[AC_CACHE_CHECK(for ${CC-cc} option to accept ANSI C, 23fp_cv_prog_cc_stdc, 24[fp_cv_prog_cc_stdc=no 25ac_save_CFLAGS="$CFLAGS" 26# Don't try gcc -ansi; that turns off useful extensions and 27# breaks some systems' header files. 28# AIX -qlanglvl=ansi 29# Ultrix and OSF/1 -std1 30# HP-UX -Ae or -Aa -D_HPUX_SOURCE 31# SVR4 -Xc 32# For HP-UX, we try -Ae first; this turns on ANSI but also extensions, 33# as well as defining _HPUX_SOURCE, and we can then use long long. 34# We keep the old version for backward compatibility. 35for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" -Xc 36do 37 CFLAGS="$ac_save_CFLAGS $ac_arg" 38 AC_TRY_COMPILE( 39[#ifndef __STDC__ 40choke me 41#endif 42], [int test (int i, double x); 43struct s1 {int (*f) (int a);}; 44struct s2 {int (*f) (double a);};], 45[fp_cv_prog_cc_stdc="$ac_arg"; break]) 46done 47CFLAGS="$ac_save_CFLAGS" 48]) 49case "x$fp_cv_prog_cc_stdc" in 50 x|xno) ;; 51 *) CC="$CC $fp_cv_prog_cc_stdc" ;; 52esac 53]) 54 55AC_DEFUN(AC_PROG_LN, 56[AC_MSG_CHECKING(whether ln works) 57AC_CACHE_VAL(ac_cv_prog_LN, 58[rm -f conftestdata conftestlink 59echo > conftestdata 60if ln conftestdata conftestlink 2>/dev/null 61then 62 rm -f conftestdata conftestlink 63 ac_cv_prog_LN="ln" 64else 65 rm -f conftestdata 66 ac_cv_prog_LN="cp" 67fi])dnl 68LN="$ac_cv_prog_LN" 69if test "$ac_cv_prog_LN" = "ln"; then 70 AC_MSG_RESULT(yes) 71else 72 AC_MSG_RESULT(no) 73fi 74AC_SUBST(LN)dnl 75]) 76 77builtin(include, aczsh.m4) 78