Commit aca2e347 authored by panne's avatar panne

[project @ 2004-08-30 19:28:46 by panne]

Cleaned up FPTOOLS_UNDERSCORE (changequote is evil!) and renamed it to
FP_LEADING_UNDERSCORE
parent 0aa75e68
......@@ -171,72 +171,56 @@ done
])# FP_CHECK_CONSTS
dnl ** check for leading underscores in symbol names
dnl
dnl Test for determining whether symbol names have a leading
dnl underscore.
dnl
dnl We assume that they _haven't_ if anything goes wrong.
dnl
dnl Some nlist implementations seem to try to be compatible by ignoring
dnl a leading underscore sometimes (eg. FreeBSD). We therefore have
dnl to work around this by checking for *no* leading underscore first.
dnl Sigh. --SDM
dnl
dnl Similarly on OpenBSD, but this test doesn't help. -- dons
dnl
AC_DEFUN(FPTOOLS_UNDERSCORE,
[AC_CHECK_LIB(elf, nlist, LIBS="-lelf $LIBS")dnl
AC_CACHE_CHECK([leading underscore in symbol names], fptools_cv_lead_uscore,
dnl
dnl Hack!: nlist() under Digital UNIX insist on there being an _,
dnl but symbol table listings shows none. What is going on here?!?
dnl
dnl Another hack: cygwin doesn't come with nlist.h , so we hardwire
dnl the underscoredness of that "platform"
changequote(<<, >>)dnl
<<
# FP_LEADING_UNDERSCORE
# ---------------------
# Test for determining whether symbol names have a leading underscore. We assume
# that they _haven't_ if anything goes wrong. Sets the output variable
# LeadingUnderscore to YES or NO and defines LEADING_UNDERSCORE correspondingly.
#
# Some nlist implementations seem to try to be compatible by ignoring a leading
# underscore sometimes (eg. FreeBSD). We therefore have to work around this by
# checking for *no* leading underscore first. Sigh. --SDM
#
# Similarly on OpenBSD, but this test doesn't help. -- dons
AC_DEFUN([FP_LEADING_UNDERSCORE],
[AC_CHECK_LIB([elf], [nlist], [LIBS="-lelf $LIBS"])
AC_CACHE_CHECK([leading underscore in symbol names], [fptools_cv_leading_underscore], [
# Hack!: nlist() under Digital UNIX insist on there being an _,
# but symbol table listings shows none. What is going on here?!?
#
# Another hack: cygwin doesn't come with nlist.h , so we hardwire
# the underscoredness of that "platform"
case $HostPlatform in
*openbsd*) # x86 openbsd is ELF from 3.4 >, meaning no leading uscore
case $build in
i386-*2\.[[0-9]] | i386-*3\.[[0-3]] ) fptools_cv_lead_uscore='yes' ;;
*) fptools_cv_lead_uscore='no' ;;
esac ;;
alpha-dec-osf*) fptools_cv_lead_uscore='no';;
*cygwin32) fptools_cv_lead_uscore='yes';;
*mingw32) fptools_cv_lead_uscore='yes';;
*) >>
changequote([, ])dnl
AC_TRY_RUN([#ifdef HAVE_NLIST_H
case $build in
i386-*2\.@<:@0-9@:>@ | i386-*3\.@<:@0-3@:>@ ) fptools_cv_leading_underscore=yes ;;
*) fptools_cv_leading_underscore=no ;;
esac ;;
alpha-dec-osf*) fptools_cv_leading_underscore=no;;
*cygwin32) fptools_cv_leading_underscore=yes;;
*mingw32) fptools_cv_leading_underscore=yes;;
*) AC_TRY_RUN([#ifdef HAVE_NLIST_H
#include <nlist.h>
changequote(<<, >>)dnl
<<
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}};
#endif
main(argc, argv)
int argc;
char **argv;
int main()
{
#ifdef HAVE_NLIST_H
if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0)
exit(1);
if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0)
exit(0);>>
changequote([, ])dnl
exit(0);
#endif
exit(1);
}], fptools_cv_lead_uscore=yes, fptools_cv_lead_uscore=no, fptools_cv_lead_uscore=NO)
}], [fptools_cv_leading_underscore=yes], [fptools_cv_leading_underscore=no], [fptools_cv_leading_underscore=no])
;;
esac);
LeadingUnderscore=`echo $fptools_cv_lead_uscore | sed 'y/yesno/YESNO/'`
AC_SUBST(LeadingUnderscore)
case $LeadingUnderscore in
YES) AC_DEFINE([LEADING_UNDERSCORE], [1], [Define to 1 if C symbols have a leading underscore added by the compiler.]);;
esac
])
esac]);
AC_SUBST([LeadingUnderscore], [`echo $fptools_cv_leading_underscore | sed 'y/yesno/YESNO/'`])
if test x"$fptools_cv_leading_underscore" = xyes; then
AC_DEFINE([LEADING_UNDERSCORE], [1], [Define to 1 if C symbols have a leading underscore added by the compiler.])
fi])# FP_LEADING_UNDERSCORE
# FP_COMPARE_VERSIONS(VERSION1, TEST, VERSION2, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
......
......@@ -1424,7 +1424,7 @@ dnl ** are we big endian?
AC_C_BIGENDIAN
dnl ** check for leading underscores in symbol names
FPTOOLS_UNDERSCORE
FP_LEADING_UNDERSCORE
dnl ** check for ld, and whether ld has -x option
AC_PATH_PROG(LdCmdRaw, ld)
......
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