alike: a loop over a sorted list of possible files.
Don't cleanup on errors, the trap will do it.
Cleanup when there are no errors.
(_AC_EXEEXT): Use the empty string instead of `no' as the cached
value.
Be sure to prefer `.exe' to `' when the two are observable.
Suggested by Lars and Earnie.
+2000-11-30 Akim Demaille <akim@epita.fr>
+
+ * acspecific.m4 (_AC_EXEEXT, _AC_OBJEXT): Make the two macros more
+ alike: a loop over a sorted list of possible files.
+ Don't cleanup on errors, the trap will do it.
+ Cleanup when there are no errors.
+ (_AC_EXEEXT): Use the empty string instead of `no' as the cached
+ value.
+ Be sure to prefer `.exe' to `' when the two are observable.
+ Suggested by Lars and Earnie.
+
2000-11-30 Akim Demaille <akim@epita.fr>
When using Cygwin, in spite of all their efforts, it may happen
# add .exe for Cygwin or mingw32. Otherwise, it compiles a test
# executable. If this is called, the executable extensions will be
# automatically used by link commands run by the configure script.
+#
+# This macro is called by AC_LANG_COMPILER, the latter being required
+# by the AC_COMPILE_IFELSE macros, so use AC_TRY_EVAL.
m4_define([_AC_EXEEXT],
[AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
[case "$CYGWIN $MINGW32 $EMXOS2" in
*yes*) ac_cv_exeext=.exe ;;
*)
- _AC_LINK_IFELSE([AC_LANG_PROGRAM()],
- [if test ! -f conftest; then
- for ac_file in conftest.*; do
- case $ac_file in
- *.$ac_ext | *.o | *.obj | *.xcoff) ;;
- *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`;;
- esac
- done
- fi],
- [AC_MSG_ERROR([cannot compile and link])])
- test -n "$ac_cv_exeext" && ac_cv_exeext=no;;
+ AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+ if AC_TRY_EVAL(ac_link); then
+ # If both `conftest.exe' and `conftest' are `present' (well, observable)
+ # catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
+ # work properly (i.e., refer to `conftest.exe'), while it won't with
+ # `rm'.
+ for ac_file in `ls conftest.exe conftest conftest.* 2>/dev/null`; do
+ case $ac_file in
+ *.$ac_ext | *.o | *.obj | *.xcoff | *.tds) ;;
+ *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`
+ break;;
+ esac
+ done
+ rm -f conftest.$ac_objext conftest.$ac_ext
+ else
+ AC_MSG_ERROR([cannot compile and link])
+ fi
+ ;;
esac])
-EXEEXT=
-test "$ac_cv_exeext" != no && EXEEXT=$ac_cv_exeext
-dnl Setting ac_exeext will implicitly change the ac_link command.
+AC_SUBST([EXEEXT], [$ac_cv_exeext])dnl
ac_exeext=$EXEEXT
-AC_SUBST(EXEEXT)dnl
])# _AC_EXEEXT
# When the w32 free Borland C++ command line compiler links a program
# (conftest.exe), it also produces a file named `conftest.tds' in
# addition to `conftest.obj'
+#
+# This macro is called by AC_LANG_COMPILER, the latter being required
+# by the AC_COMPILE_IFELSE macros, so use AC_TRY_EVAL.
m4_define([_AC_OBJEXT],
[AC_CACHE_CHECK([for object suffix], ac_cv_objext,
[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
if AC_TRY_EVAL(ac_compile); then
for ac_file in `ls conftest.o conftest.obj conftest.* 2>/dev/null`; do
case $ac_file in
- *.o | *.obj ) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`;;
*.$ac_ext | *.tds ) ;;
- *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`;;
+ *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+ break;;
esac
done
+ rm -f conftest.$ac_objext conftest.$ac_ext
else
- rm -f conftest.$ac_ext
AC_MSG_ERROR([cannot compile])
fi])
AC_SUBST(OBJEXT, $ac_cv_objext)dnl
ac_objext=$ac_cv_objext
-rm -f conftest.$ac_objext conftest.$ac_ext
])# _AC_OBJEXT
# add .exe for Cygwin or mingw32. Otherwise, it compiles a test
# executable. If this is called, the executable extensions will be
# automatically used by link commands run by the configure script.
+#
+# This macro is called by AC_LANG_COMPILER, the latter being required
+# by the AC_COMPILE_IFELSE macros, so use AC_TRY_EVAL.
m4_define([_AC_EXEEXT],
[AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
[case "$CYGWIN $MINGW32 $EMXOS2" in
*yes*) ac_cv_exeext=.exe ;;
*)
- _AC_LINK_IFELSE([AC_LANG_PROGRAM()],
- [if test ! -f conftest; then
- for ac_file in conftest.*; do
- case $ac_file in
- *.$ac_ext | *.o | *.obj | *.xcoff) ;;
- *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`;;
- esac
- done
- fi],
- [AC_MSG_ERROR([cannot compile and link])])
- test -n "$ac_cv_exeext" && ac_cv_exeext=no;;
+ AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+ if AC_TRY_EVAL(ac_link); then
+ # If both `conftest.exe' and `conftest' are `present' (well, observable)
+ # catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
+ # work properly (i.e., refer to `conftest.exe'), while it won't with
+ # `rm'.
+ for ac_file in `ls conftest.exe conftest conftest.* 2>/dev/null`; do
+ case $ac_file in
+ *.$ac_ext | *.o | *.obj | *.xcoff | *.tds) ;;
+ *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`
+ break;;
+ esac
+ done
+ rm -f conftest.$ac_objext conftest.$ac_ext
+ else
+ AC_MSG_ERROR([cannot compile and link])
+ fi
+ ;;
esac])
-EXEEXT=
-test "$ac_cv_exeext" != no && EXEEXT=$ac_cv_exeext
-dnl Setting ac_exeext will implicitly change the ac_link command.
+AC_SUBST([EXEEXT], [$ac_cv_exeext])dnl
ac_exeext=$EXEEXT
-AC_SUBST(EXEEXT)dnl
])# _AC_EXEEXT
# When the w32 free Borland C++ command line compiler links a program
# (conftest.exe), it also produces a file named `conftest.tds' in
# addition to `conftest.obj'
+#
+# This macro is called by AC_LANG_COMPILER, the latter being required
+# by the AC_COMPILE_IFELSE macros, so use AC_TRY_EVAL.
m4_define([_AC_OBJEXT],
[AC_CACHE_CHECK([for object suffix], ac_cv_objext,
[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
if AC_TRY_EVAL(ac_compile); then
for ac_file in `ls conftest.o conftest.obj conftest.* 2>/dev/null`; do
case $ac_file in
- *.o | *.obj ) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`;;
*.$ac_ext | *.tds ) ;;
- *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`;;
+ *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+ break;;
esac
done
+ rm -f conftest.$ac_objext conftest.$ac_ext
else
- rm -f conftest.$ac_ext
AC_MSG_ERROR([cannot compile])
fi])
AC_SUBST(OBJEXT, $ac_cv_objext)dnl
ac_objext=$ac_cv_objext
-rm -f conftest.$ac_objext conftest.$ac_ext
])# _AC_OBJEXT
projects / thirdparty / autoconf.git / commitdiff
