[Mesa-dev] [PATCH] configure.ac: check for libexpat when no pkg-config is available

[Andres Gomez]

Previously, when no pkg-config was available for
libexpat we would just add the needed linking
flags without any extra check.

Now, we check that the library and the headers are
also installed in the building environment.
---
 configure.ac | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2a5c143..a8f814d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1126,14 +1126,13 @@ if test "x$enable_dri" = xyes; then
     fi
 
     # Check for expat
-    PKG_CHECK_EXISTS([expat], [have_expat=yes], [have_expat=no])
-    if test "x$have_expat" = "xyes"; then
-       PKG_CHECK_MODULES([EXPAT], [expat], [],
-                         AC_MSG_ERROR([Expat required for DRI.]))
-    else
-       # expat version 2.0 and earlier do not provide expat.pc
-       EXPAT_LIBS=-lexpat
-    fi
+    PKG_CHECK_MODULES([EXPAT], [expat], [],
+        # expat version 2.0 and earlier do not provide expat.pc
+        [AC_CHECK_HEADER([expat.h],[],
+                         [AC_MSG_ERROR([Expat headers required for DRI not found])])
+         AC_CHECK_LIB([expat],[XML_ParserCreate],[],
+                     [AC_MSG_ERROR([Expat library required for DRI not found])])
+         EXPAT_LIBS="-lexpat"])
 
     DRICOMMON_NEED_LIBDRM=no
     # If we are building any DRI driver other than swrast.
-- 
1.9.1