Matthias Kilian wrote:
On Wed, Jan 30, 2008 at 08:13:01PM +1100, Manuel M T Chakravarty wrote:
[...]
This is due to a change of the configure stage that AFAIK was made to
easy building on windows. Instead, of using shell commands/scripts
(as GHC did previously) to obtain some configuration information (here
the file path at which the top of the GHC build tree is located), the
build system now uses small Haskell programs/scripts. This makes the
build more portable ** if there is already a Haskell compiler on the
system **.
But it just doesn't make sense at all. You need a good set of shell
commands at all, since they're used by configure as well as in
Makefiles. I really can't believe that simple stuff like this doesn't
work on windos:
--- aclocal.m4.orig Mon Dec 10 19:11:31 2007
+++ aclocal.m4 Sun Jan 20 17:10:07 2008
@@ -1098,20 +1098,14 @@ AC_REQUIRE([AC_PROG_CC])
AC_DEFUN([FP_FIND_ROOT],[
AC_MSG_CHECKING(for path to top of build tree)
-dnl This would be
-dnl make -C utils/pwd clean && make -C utils/pwd
-dnl except we don't want to have to know what make is called. Sigh.
-if test ! -f utils/pwd/pwd && test ! -f utils/pwd/pwd.exe; then
- cd utils/pwd
- rm -f *.o
- rm -f *.hi
- rm -f pwd
- rm -f pwd.exe
- $WithGhc -v0 --make pwd -o pwd
- cd ../..
-fi
-
-hardtop=`utils/pwd/pwd forwardslash`
+case $HostPlatform in
+*cygwin32|*mingw32)
+ hardtop=`pwd | tr \\ /`
+ ;;
+*)
+ hardtop=`pwd`
+ ;;
+esac
if ! test -d "$hardtop"; then
AC_MSG_ERROR([cannot determine current directory])
Things are complicated because
- on Cygwin, pwd gives you /cygdrive/c/...
- on MSYS, pwd gives you /c/...
(remember we still support MSYS), and we want c:/...
So we used to use cygpath on cygwin, and some horrible sed command on MSYS,
IIRC. It was a mess, and frequently went wrong.
Sure there are other ways to do it, but I think at the time it seemed
simpler to write a Haskell program. In hindsight, probably a C program
(compiled using mingw gcc) would be better for bootstrapping. A shell
script would be problematic for the reasons above, I'm guessing.
Cheers,
Simon
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