Commit 5e5ec077 authored by sof's avatar sof

[project @ 1998-09-29 17:30:09 by sof]

Added feature tests for etext and end plus text vs. data section placement in executable
parent 9065404a
dnl $Id: aclocal.m4,v 1.27 1998/08/16 16:45:37 sof Exp $
dnl $Id: aclocal.m4,v 1.28 1998/09/29 17:30:09 sof Exp $
dnl
dnl Extra autoconf macros for the Glasgow fptools
dnl
......@@ -69,6 +69,7 @@ changequote(<<, >>)dnl
<<
case $HostPlatform in
alpha-dec-osf*) fptools_cv_lead_uscore='no';;
*cygwin32) fptools_cv_lead_uscore='yes';;
*) >>
changequote([, ])dnl
AC_TRY_RUN([#ifdef HAVE_NLIST_H
......@@ -422,3 +423,70 @@ AC_DEFINE(HAVE_O_BINARY)
fi
])
dnl *** Which one comes first, .text or .data? ***
dnl
AC_DEFUN(FPTOOLS_CODE_BEFORE_DATA,
[AC_CACHE_CHECK([if code section appears before data], fptools_cv_code_bef_data,
[AC_TRY_RUN([
int f() { return 1; }
int i;
int main() { return ((char*)&f > (char*)&i); }
],
fptools_cv_code_bef_data=yes, fptools_cv_code_bef_data=no)])
if test "$fptools_cv_code_bef_data" = yes; then
AC_DEFINE(CODE_BEFORE_DATA)
fi
])
dnl *** Helper function **
dnl
AC_DEFUN(FPTOOLS_IN_SCOPE,AC_TRY_LINK([extern char* $1;],[return (int)&$2], $3=yes, $3=no))
dnl *** What's the end-of-text-section marker called? ***
dnl
AC_DEFUN(FPTOOLS_END_TEXT_SECTION,
[AC_CACHE_CHECK([for end of text section marker], fptools_cv_end_of_text,
[
not_done=1
for i in etext _etext __etext; do
FPTOOLS_IN_SCOPE($i,$i,fptools_cv_end_of_text)
if test "$fptools_cv_end_of_text" = yes; then
AC_DEFINE(TEXT_SECTION_END_MARKER, $i)
not_done=0
break
fi
done
if test "$not_done"; then
FPTOOLS_IN_SCOPE(etext asm("etext"),etext,fptools_cv_end_of_text);
if test "$fptools_cv_end_of_text" = yes; then
AC_DEFINE(TEXT_SECTION_END_MARKER, etext asm("etext"))
else
AC_DEFINE(TEXT_SECTION_END_MARKER, dunno_what_it_is)
fi
fi
])])
dnl *** What's the end-of-data-section marker called? ***
dnl
AC_DEFUN(FPTOOLS_END_DATA_SECTION,
[AC_CACHE_CHECK([for end of data section marker], fptools_cv_end_of_data,
[
not_done=1
for i in end _end __end; do
FPTOOLS_IN_SCOPE($i,$i,fptools_cv_end_of_data)
if test "$fptools_cv_end_of_data" = yes; then
AC_DEFINE(DATA_SECTION_END_MARKER, $i)
not_done=0
break
fi
done
if test "$not_done"; then
FPTOOLS_IN_SCOPE(end asm("end"),end,fptools_cv_end_of_data);
if test "$fptools_cv_end_of_data" = yes; then
AC_DEFINE(DATA_SECTION_END_MARKER, end asm("end"))
else
AC_DEFINE(DATA_SECTION_END_MARKER, dunno_what_it_is)
fi
fi
])])
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