From: Maynard Johnson <maynardj@us.ibm.com>
Git-commit: a2811baceccff810e055f166792acdf7a920bf8c
Subject: configure error message for missing libpfm is not informative enough
Date: Wed Oct 9 14:27:54 2013 -0500

    configure error message for missing libpfm is not informative enough
    
    On the ppc64 architecture, the libpfm library is used to get perf_events
    encodings for events, so the configure script checks for the availability
    of that library when building for ppc64. If the library is missing, the
    configure error message is:
    
      checking for perfmon/pfmlib.h... no
      configure: error: pfmlib.h not found; usually provided in papi devel package
    
    However, some newer distros (like Fedora 19) are now delivering separate
    packages for libpfm and papi, instead of bundling them together. The patch
    provided herein changes the configure message to reflect that change in
    packaging.
    
    Signed-off-by: Maynard Johnson <maynardj@us.ibm.com>

diff --git a/configure.ac b/configure.ac
index 758b676..457145a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -185,10 +185,10 @@ AC_CANONICAL_HOST
 if test "$HAVE_PERF_EVENTS" = "1"; then
 	PFM_LIB=
 	if test "$host_cpu" = "powerpc64"; then
-		AC_CHECK_HEADER(perfmon/pfmlib.h,,[AC_MSG_ERROR([pfmlib.h not found; usually provided in papi devel package])])
+		AC_CHECK_HEADER(perfmon/pfmlib.h,,[AC_MSG_ERROR([pfmlib.h not found; may be provided by libpfm devel or papi devel package])])
 		AC_CHECK_LIB(pfm,pfm_get_os_event_encoding, HAVE_LIBPFM3='0'; HAVE_LIBPFM='1', [
 			AC_CHECK_LIB(pfm, pfm_get_event_name, HAVE_LIBPFM3='1'; HAVE_LIBPFM='1',
-			[AC_MSG_ERROR([libpfm not found; usually provided in papi devel package])])])
+			[AC_MSG_ERROR([libpfm not found; may be provided by libpfm devel or papi devel package])])])
 		PFM_LIB="-lpfm"
 		AC_DEFINE_UNQUOTED(HAVE_LIBPFM3, $HAVE_LIBPFM3, [Define to 1 if using libpfm3; 0 if using newer libpfm])
 		AC_DEFINE_UNQUOTED(HAVE_LIBPFM, $HAVE_LIBPFM, [Define to 1 if libpfm is available])