From f1285b7f4b24968b2dd6fa80612bac0847ac26ee Mon Sep 17 00:00:00 2001
From: Eric McConville <erichasemail@gmail.com>
Date: Wed, 27 Nov 2013 15:15:14 -0600
Subject: Created DETECT_CLANG autoconf function, and excluded '-pthread' from
 CFLAGS when GCC is clang

---
 configure.ac | 40 ++++++++++++++++++++++++++++++++++------
 1 file changed, 34 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 4bedb4d..1f8e485 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,6 +42,27 @@ AC_DEFUN([DETECT_ICC],
     fi
 ])
 
+dnl **********************************************************************
+dnl DETECT_CLANG ([ACTION-IF-YES], [ACTION-IF-NO])
+dnl
+dnl check if compiler is clang, and if so run the ACTION-IF-YES sets the
+dnl $CLANG variable to "yes" or "no"
+dnl **********************************************************************
+AC_DEFUN([DETECT_CLANG],
+[
+    AC_MSG_CHECKING([for clang in use])
+    AC_COMPILE_IFELSE(
+    [AC_LANG_PROGRAM([], [[
+    #ifndef __clang__
+           not clang
+    #endif
+    ]])],
+    [CLANG=yes], [CLANG=no])
+    AC_MSG_RESULT([$CLANG])
+    AS_IF([test "$CLANG" = "yes"],[$1],[$2])
+])
+DETECT_CLANG([],[])
+
 dnl **********************************************************************
 dnl DETECT_SUNCC ([ACTION-IF-YES], [ACTION-IF-NO])
 dnl
@@ -56,7 +77,8 @@ AC_DEFUN([DETECT_SUNCC],
 ])
 
 AS_IF(test "x$GCC" = "xyes",
-      DETECT_ICC([CFLAGS="-pthread $CFLAGS"], [CFLAGS="-fvisibility=hidden -pthread $CFLAGS"]),
+      DETECT_ICC([CFLAGS="-pthread $CFLAGS"],
+            DETECT_CLANG([], [CFLAGS="-fvisibility=hidden -pthread $CFLAGS"])),
       ICC=no
       DETECT_SUNCC([CFLAGS="-xldscope=hidden -mt -xc99=all $CFLAGS"], []))
 
@@ -85,6 +107,7 @@ AS_IF([test "x$enable_sasl_pwdb" = "xyes"],
       [enable_sasl=yes ])
 
 
+
 dnl **********************************************************************
 dnl DETECT_SASL_CB_GETCONF
 dnl
@@ -206,11 +229,8 @@ AC_SUBST(PROFILER_LDFLAGS)
 AC_ARG_ENABLE(coverage,
   [AS_HELP_STRING([--enable-coverage],[Disable code coverage])])
 
-if test "x$enable_coverage" = "xyes"; then
-   if test "$ICC" = "yes"
-   then
-      AC_MSG_WARN([icc doesn't support code coverage checking])
-   elif test "$GCC" = "yes"
+if test "x$enable_coverage" != "xno"; then
+   if test "$GCC" = "yes" -a "$ICC" != "yes" -a "$CLANG" != "yes"
    then
       AC_PATH_PROG([PROFILER], [gcov], "no", [$PATH])
       if test "x$PROFILER" != "xno"; then
@@ -230,6 +250,14 @@ if test "x$enable_coverage" = "xyes"; then
       if test "x$PROFILER" != "xno"; then
          PROFILER_FLAGS=-xprofile=tcov
       fi
+   elif test "x$CLANG" != "xno"
+   then
+      AC_PATH_PROG([PROFILER], [gcov], "no", [$PATH])
+      if test "x$PROFILER" != "xno"
+      then
+          PROFILER_FLAGS="-fprofile-arcs -ftest-coverage"
+          PROFILER_LDFLAGS=
+      fi
    fi
 fi
 AC_SUBST(PROFILER_FLAGS)
-- 
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