From e67196812c2ab45e15de09922084082d887b8473 Mon Sep 17 00:00:00 2001
From: Ari Johnson <ari@theari.com>
Date: Thu, 28 Apr 2011 15:03:31 -0400
Subject: [PATCH] Add m4/ax_find_common_prefixes.m4 to search for common places
 where libraries and headers may be installed

---
 Makefile.in                   |  1 +
 acinclude.m4                  |  1 +
 configure.ac                  |  1 +
 m4/ax_find_common_prefixes.m4 | 42 +++++++++++++++++++++++++++++++++++
 4 files changed, 45 insertions(+)
 create mode 100644 m4/ax_find_common_prefixes.m4

diff --git a/Makefile.in b/Makefile.in
index 4fcf75d..98318d8 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -20,6 +20,7 @@ CC=@CC@
 SQL_CFLAGS=@MYSQL_CFLAGS@ @POSTGRESQL_CFLAGS@ @SQLITE3_CFLAGS@
 SQL_LDFLAGS=@MYSQL_LDFLAGS@ @POSTGRESQL_LDFLAGS@ @SQLITE3_LDFLAGS@
 
+CPPFLAGS=@CPPFLAGS@
 CCFLAGS=@CFLAGS@ -I.. -I../hdrs @OPENSSL_INCLUDES@ @CPPFLAGS@ @PCRE_CFLAGS@ -Werror
 LDFLAGS=@LDFLAGS@  @OPENSSL_INCLUDES@
 CLIBS=@LIBS@ @PCRE_LIBS@ @LIBLTDL@ @LIBLUA@ @OPENSSL_LIBS@
diff --git a/acinclude.m4 b/acinclude.m4
index 9d29bfc..ebf8b87 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1,3 +1,4 @@
+m4_include([m4/ax_find_common_prefixes.m4])
 m4_include([m4/ltdl.m4])
 # SQL Includes
 m4_include(m4/lib_mysql.m4)
diff --git a/configure.ac b/configure.ac
index b41cf49..e324915 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,6 +9,7 @@
 AC_PREREQ([2.65])
 AC_INIT([CobraMUSH], [0.80], [http://redmine.cobramush.org])
 AC_CONFIG_HEADERS(config.h)
+AX_FIND_COMMON_PREFIXES([lua5.1])
 
 m4_include(m4/confsetup.m4)
 
diff --git a/m4/ax_find_common_prefixes.m4 b/m4/ax_find_common_prefixes.m4
new file mode 100644
index 0000000..f9fefa3
--- /dev/null
+++ b/m4/ax_find_common_prefixes.m4
@@ -0,0 +1,42 @@
+dnl AX_FIND_COMMON_PREFIXES([list of include subdirectories])
+AC_DEFUN([AX_FIND_COMMON_PREFIXES], [
+  AC_MSG_NOTICE([Scanning for common include/library prefixes...])
+  if test -n "$1"; then
+    for subdirectory in $1; do
+      AC_MSG_CHECKING([for /usr/include/$subdirectory])
+      if test -d "/usr/include/$subdirectory"; then
+        AC_MSG_RESULT([yes])
+        CPPFLAGS="$CPPFLAGS -I/usr/include/$subdirectory"
+      else
+        AC_MSG_RESULT([no])
+      fi
+    done
+  fi
+  for prefix in /usr/local /opt /opt/local /opt/ports /sw; do
+    AC_MSG_CHECKING([for $prefix/include])
+    if test -d "$prefix/include"; then
+      AC_MSG_RESULT([yes])
+      CPPFLAGS="$CPPFLAGS -I$prefix/include"
+      if test -n "$1"; then
+        for subdirectory in $1; do
+          AC_MSG_CHECKING([for $prefix/include/$subdirectory])
+          if test -d "$prefix/include/$subdirectory"; then
+            AC_MSG_RESULT([yes])
+            CPPFLAGS="$CPPFLAGS -I$prefix/include/$subdirectory"
+          else
+            AC_MSG_RESULT([no])
+          fi
+        done
+      fi
+    else
+      AC_MSG_RESULT([no])
+    fi
+    AC_MSG_CHECKING([for $prefix/lib])
+    if test -d "$prefix/lib"; then
+      AC_MSG_RESULT([yes])
+      LDFLAGS="$LDFLAGS -L$prefix/lib"
+    else
+      AC_MSG_RESULT([no])
+    fi
+  done
+])dnl
-- 
2.30.2