-dnl $Id: aclocal.m4,v 1.29 1998/10/05 14:15:32 simonm Exp $
+dnl $Id: aclocal.m4,v 1.36 1999/01/11 10:15:04 sof Exp $
dnl
dnl Extra autoconf macros for the Glasgow fptools
dnl
fi
])
+
dnl ** check for leading underscores in symbol names
dnl
dnl Test for determining whether symbol names have a leading
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
<<
case $HostPlatform in
int main() { return ((char*)&f > (char*)&i); }
],
-fptools_cv_code_bef_data=yes, fptools_cv_code_bef_data=no)])
+fptools_cv_code_bef_data=yes, fptools_cv_code_bef_data=no,false)])
if test "$fptools_cv_code_bef_data" = yes; then
AC_DEFINE(CODE_BEFORE_DATA)
fi
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,
-[
+[AC_MSG_CHECKING([for end of text section marker])
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, $i)
+ FPTOOLS_IN_SCOPE($i,$i,fptools_end_of_text)
+ if test "$fptools_end_of_text" = yes; then
+ AC_CACHE_VAL([fptools_cv_end_of_text_decl], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, $i))
+ AC_CACHE_VAL([fptools_cv_end_of_text], AC_DEFINE_UNQUOTED(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 "$fptools_cv_end_of_text" = yes; then
- AC_DEFINE(TEXT_SECTION_END_MARKER, etext asm("etext"))
+if test "$not_done" = 1; then
+FPTOOLS_IN_SCOPE(etext asm("etext"),etext,fptools_end_of_text);
+if test "$fptools_end_of_text" = yes; then
+ AC_CACHE_VAL([fptools_cv_end_of_text], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, etext))
+ AC_CACHE_VAL([fptools_cv_end_of_text_decl], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, etext asm("etext")))
else
- AC_DEFINE(TEXT_SECTION_END_MARKER, dunno_what_it_is)
+ AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, dunno_what_it_is)
+ AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, dunno_what_it_is)
fi
fi
-])])
+AC_MSG_RESULT([$]fptools_cv_end_of_text)
+])
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,
-[
+[AC_MSG_CHECKING([for end of data section marker])
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, $i)
+ FPTOOLS_IN_SCOPE($i,$i,fptools_end_of_data)
+ if test "$fptools_end_of_data" = yes; then
+ AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, $i)])
+ AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(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 "$fptools_cv_end_of_data" = yes; then
- AC_DEFINE(DATA_SECTION_END_MARKER, end asm("end"))
+if test "$not_done" = 1; then
+FPTOOLS_IN_SCOPE(end asm("end"),end,fptools_end_of_data);
+if test "$fptools_end_of_data" = yes; then
+ AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, end asm("end"))])
+ AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, end)])
else
- AC_DEFINE(DATA_SECTION_END_MARKER, dunno_what_it_is)
+ AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, dunno_what_it_is)])
+ AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, dunno_what_it_is)])
fi
fi
-])])
+AC_MSG_RESULT([$]fptools_cv_end_of_data)
+])
+
+
+
+dnl Based on AC_TRY_LINK - run iftrue if links cleanly with no warning
+
+dnl FPTOOLS_TRY_LINK_NOWARN(flags,main?,iftrue,iffalse)
+
+AC_DEFUN(FPTOOLS_TRY_LINK_NOWARN,
+[
+ac_save_LIBS="$LIBS"
+LIBS=[$1];
+cat > conftest.$ac_ext <<EOF
+dnl This sometimes fails to find confdefs.h, for some reason.
+dnl [#]line __oline__ "[$]0"
+[#]line __oline__ "configure"
+#include "confdefs.h"
+[$2]
+int t() { return 0; }
+EOF
+if AC_TRY_EVAL(ac_link); then
+ ifelse([$3], , :, [
+ LIBS="$ac_save_LIBS"
+ rm -rf conftest*
+ $3])
+ ifelse([$4], , , [else
+ LIBS="$ac_save_LIBS"
+ rm -rf conftest*
+ $4
+])dnl
+fi
+rm -f conftest*
+]
+)
+
+dnl Loosely based on AC_CHECK_LIB in acgeneral.m4 in autoconf distribution
+
+dnl FPTOOLS_CHECK_FLAG_NOWARN(NAME, FLAG, CODE, iftrue, iffalse)
+
+AC_DEFUN(FPTOOLS_CHECK_FLAG_NOWARN,
+[AC_MSG_CHECKING([for $1])
+ AC_CACHE_VAL(ac_cv_flag_$1,
+ [FPTOOLS_TRY_LINK_NOWARN("$2", [main() { $3; exit(0); } ],
+ eval "ac_cv_flag_$1=yes",
+ eval "ac_cv_flag_$1=no"
+ )]
+ )
+if eval "test \"`echo '$ac_cv_flag_'$1`\" = yes"; then
+ AC_MSG_RESULT(yes)
+ LIBS="$2 $LIBS"
+ $4
+else
+ AC_MSG_RESULT(no)
+ $5
+fi
+])
+
+dnl FPTOOLS_CHECK_LIB_NOWARN(LIBRARY, FUNCTION)
+
+AC_DEFUN(FPTOOLS_CHECK_LIB_NOWARN,
+[FPTOOLS_CHECK_FLAG_NOWARN([function_$2],[],[extern char $2(); $2();],
+[changequote(, )dnl
+ ac_tr_lib=HAVE_LIB`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+ changequote([, ])dnl
+ AC_DEFINE_UNQUOTED($ac_tr_lib)
+],
+[FPTOOLS_CHECK_FLAG_NOWARN([library_$1],[-l$1],[extern char $2(); $2();],
+[changequote(, )dnl
+ ac_tr_lib=HAVE_LIB`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+ changequote([, ])dnl
+ AC_DEFINE_UNQUOTED($ac_tr_lib)
+],
+[]
+)])]
+)
+
+dnl check for prototypes
+dnl
+AC_DEFUN(AC_C_PROTOTYPES,
+[AC_CACHE_CHECK([prototypes], ac_cv_prototypes,
+[AC_TRY_COMPILE([
+void foo(int);
+void foo(i)
+int i; {
+return;
+}
+],
+[int i;],
+ac_cv_prototypes=yes,
+ac_cv_prototypes=no)])
+if test "$ac_cv_prototypes" = yes; then
+AC_DEFINE(HAVE_PROTOTYPES)
+fi
+])
+
+
+# LocalWords: fi
projects / ghc-hetmet.git / blobdiff