[Mesa3d-dev] [PATCH] configure.ac: add a hard requirement on makedepend

[Xavier C. <cha...@gm...>]

To quote Dan Nicholson :
"In fact, when I wrote configure.ac  originally, I wanted it to be a hard
requirement and assumed that AC_PATH_PROG would error by default if it
didn't find the program."

I have been updating and building mesa a few times per week. More often than
not, this just resulted in segfault at runtime, and I had to make clean and
do a full build again. This was simply because I did not have makedepend
installed, and parts of the tree were not rebuilt when they should.

Signed-off-by: Xavier Chantry <cha...@gm...>
---
 configure.ac |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0f51097..2ddfd14 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,8 +30,11 @@ AC_PROG_CPP
 AC_PROG_CC
 AC_PROG_CXX
 AC_CHECK_PROGS([MAKE], [gmake make])
-AC_PATH_PROG([MKDEP], [makedepend])
 AC_PATH_PROG([SED], [sed])
+AC_PATH_PROG([MKDEP], [makedepend], no)
+if test "x$MKDEP" = xno; then
+    AC_MSG_ERROR([makedepend not found])
+fi
 
 dnl Our fallback install-sh is a symlink to minstall. Use the existing
 dnl configuration in that case.
-- 
1.7.0.2