[Mesa-dev] [PATCH] build: Fix LLVM shared library detection on systems with libLLVM.so.

[Kenneth Graunke]

Arch Linux ships libLLVM.so.3.7.1 rather than libLLVM-3.7.1.so;
Mesa's configure script failed to find LLVM shared libraries in this
case.  I believe they build LLVM with CMake, but there is still only
one .so file.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

This is mostly a strawman.  llvmpipe hasn't built on my system for
quite some time, and I finally got around to figuring out why.  I don't
know much about LLVM build issues (it seems complicated), so feel free
to throw this patch out and do it properly...

diff --git a/configure.ac b/configure.ac
index c426c72..bc9530e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2334,6 +2334,12 @@ if test "x$MESA_LLVM" != x0; then
         LLVM_SO_NAME=LLVM-`$LLVM_CONFIG --version`
         AS_IF([test -f "$LLVM_LIBDIR/lib$LLVM_SO_NAME.$IMP_LIB_EXT"], [llvm_have_one_so=yes])
 
+        dnl Some systems use libLLVM.so.version instead of libLLVM-version.so.
+        if test "x$llvm_have_one_so" != xyes; then
+           LLVM_SO_NAME=LLVM
+           AS_IF([test -f "$LLVM_LIBDIR/lib$LLVM_SO_NAME.$IMP_LIB_EXT"], [llvm_have_one_so=yes])
+        fi
+
         if test "x$llvm_have_one_so" = xyes; then
             dnl LLVM was built using auto*, so there is only one shared object.
             LLVM_LIBS="-l$LLVM_SO_NAME"
-- 
2.8.0