Added support for other libmysqlclient variants

- This allows Hercules to correctly detect MariaDB and other drop-in
  replacements in distributions that rename their libmysqlclient (i.e.
  Debian / Ubuntu renaming it to libmariadbclient).
- Closes issue #368
- Due to a bug in Ubuntu 14.04 LTS (incorrect output by the
  mariadb-provided version of `mysql_config --libs` and missing
  dependencies of libmariadbclient-dev), users of said distribution will
  have to manually specify ./configure LIBS="-lssl -lcrypto" as well as
  manually install the libssl-dev package, if they wish to use
  libmariadbclient-dev, as it will be unable to link otherwise (note:
  this issue isn't Hercules-specific)
- Special thanks to Andrei Karas

Signed-off-by: Haru <haru@dotalux.com>

2 files changed, 8 insertions, 43 deletions

diff --git a/configure b/configure
index 630fbb5b9..52050b25c 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in d84fa6f.
+# From configure.in 2ae9f0c.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69.
 #
@@ -7395,45 +7395,10 @@ else
 	MYSQL_VERSION="unknown"
 fi
 
-MYSQL_OLD_LDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS $MYSQL_LIBS"
+MYSQL_OLD_LIBS="$LIBS" ; LIBS="$LIBS $MYSQL_LIBS"
 MYSQL_OLD_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS $MYSQL_CFLAGS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for mysql_init in -lmysqlclient" >&5
-$as_echo_n "checking for mysql_init in -lmysqlclient... " >&6; }
-if ${ac_cv_lib_mysqlclient_mysql_init+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lmysqlclient  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char mysql_init ();
-int
-main ()
-{
-return mysql_init ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_mysqlclient_mysql_init=yes
-else
-  ac_cv_lib_mysqlclient_mysql_init=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mysqlclient_mysql_init" >&5
-$as_echo "$ac_cv_lib_mysqlclient_mysql_init" >&6; }
-if test "x$ac_cv_lib_mysqlclient_mysql_init" = xyes; then :
+ac_fn_c_check_func "$LINENO" "mysql_init" "ac_cv_func_mysql_init"
+if test "x$ac_cv_func_mysql_init" = xyes; then :
   HAVE_MYSQL="yes"
 fi
 
@@ -7446,7 +7411,7 @@ fi
 
 
 CPPFLAGS="$MYSQL_OLD_CPPFLAGS"
-LDFLAGS="$MYSQL_OLD_LDFLAGS"
+LIBS="$MYSQL_OLD_LIBS"
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking MySQL library (required)" >&5
 $as_echo_n "checking MySQL library (required)... " >&6; }
diff --git a/configure.in b/configure.in
index cd1dbea1d..ec3b1f735 100644
--- a/configure.in
+++ b/configure.in
@@ -1256,12 +1256,12 @@ else
 	MYSQL_VERSION="unknown"
 fi
 
-MYSQL_OLD_LDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS $MYSQL_LIBS"
+MYSQL_OLD_LIBS="$LIBS" ; LIBS="$LIBS $MYSQL_LIBS"
 MYSQL_OLD_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS $MYSQL_CFLAGS"
-AC_CHECK_LIB([mysqlclient], [mysql_init], [HAVE_MYSQL="yes"], [])
+AC_CHECK_FUNC([mysql_init], [HAVE_MYSQL="yes"])
 AC_CHECK_HEADER([mysql.h], [], [HAVE_MYSQL=""])
 CPPFLAGS="$MYSQL_OLD_CPPFLAGS"
-LDFLAGS="$MYSQL_OLD_LDFLAGS"
+LIBS="$MYSQL_OLD_LIBS"
 
 AC_MSG_CHECKING([MySQL library (required)])
 if test "$HAVE_MYSQL" = "yes" ; then