Re: EXEEXT: `cc -o' (Was: AC_CYGWIN etc.)

[Mo DeJong]

On 15 Dec 2000, Akim Demaille wrote:

> 
> Here is my proposal.  Mo, could you give it a try?  Thanks!
> 
> Index: ChangeLog
> from  Akim Demaille  <address@hidden>
>       * aclang.m4 (_AC_COMPILER_EXEEXT_DEFAULT): New.
>       (_AC_COMPILER_EXEEXT_O): Extracted from...
>       (_AC_COMPILER_EXEEXT): here.  Adjust.


Humm, no luck.

checking build system type... i686-pc-linux-gnu
checking host system type... i386-pc-mingw32msvc
checking for i386-mingw32msvc-g++... i386-mingw32msvc-g++
checking whether the C++ compiler works... yes
checking whether we are cross compiling... yes
checking whether we are using the GNU C++ compiler... yes
checking for object suffix... o
checking for executable suffix... 
checking whether i386-mingw32msvc-g++ accepts -g... yes


>From config.log

configure:1518: checking for executable suffix
configure:1546: i386-mingw32msvc-g++    conftest.cc  >&5
configure:1549: $? = 0
configure:1569: i386-mingw32msvc-g++ -o conftest    conftest.cc  >&5
configure:1572: $? = 0
configure:1573: test -s conftest
configure:1576: $? = 0
configure:1601: result: 
configure:1608: checking whether i386-mingw32msvc-g++ accepts -g
configure:1629: i386-mingw32msvc-g++ -c -g  conftest.cc >&5



This patch (applied after you patch) seems to fix it:



--- akim_aclang.m4      Fri Dec 15 01:44:44 2000
+++ aclang.m4   Fri Dec 15 02:03:29 2000
@@ -668,7 +668,7 @@
           [for ac_file in `ls a.exe a.* 2>/dev/null`; do
   case $ac_file in
     *.$ac_ext | *.out | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
-    *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`
+    *) ac_cv_exeext=`expr "$ac_file" : 'a\(.*\)'`
        break;;
   esac
 done],
@@ -687,7 +687,11 @@
 # Check for the extension used when `-o foo'.  Try to see if 
ac_cv_exeext,
 # as computed by _AC_COMPILER_EXEEXT_DEFAULT is OK.
 m4_define([_AC_COMPILER_EXEEXT_O],
-[_AC_LINK_IFELSE([],
+[# Note that we have not set ac_exeext yet, so we do that here
+# because linking a file depends on ac_exeext not ac_cv_exeext
+ac_exeext_save=$ac_exeext
+ac_exeext=$ac_cv_exeext
+_AC_LINK_IFELSE([],
 [# 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
@@ -702,6 +706,7 @@
 done],
               [AC_MSG_ERROR([cannot compute EXEEXT: cannot compile and 
link])])
 rm -f conftest.$ac_ext conftest$ac_cv_exeext
+ac_exeext=$ac_exeext_save
 ])# _AC_COMPILER_EXEEXT_O




checking build system type... i686-pc-linux-gnu
checking host system type... i386-pc-mingw32msvc
checking for i386-mingw32msvc-g++... i386-mingw32msvc-g++
checking whether the C++ compiler works... yes
checking whether we are cross compiling... yes
checking whether we are using the GNU C++ compiler... yes
checking for object suffix... o
checking for executable suffix... .exe
checking whether i386-mingw32msvc-g++ accepts -g... yes


Mo DeJong
Red Hat Inc