configure: new option --enable-gcc-warnings

[bpt/emacs.git] / ChangeLog

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+2012-04-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+       configure: new option --enable-gcc-warnings
+       I have been using this change for many months in my private copy
+       of Emacs, and have used it to find several bugs.  It's mature
+       enough to publish now.
+       * Makefile.in (GNULIB_MODULES): Add warnings, manywarnings.
+       * configure.in: Support --enable-gcc-warnings, in the style of
+       other GNU packages such as coreutils.
+       (C_WARNINGS_SWITCH): Remove, replacing with...
+       (WARN_CFLAGS, GNULIB_WARN_CFLAGS): New variable.
+       (PKG_CHECK_MODULES, C_SWITCH_X_SITE): Use -isystem rather than -I,
+       when including system files with GCC.
+       * etc/NEWS: Mention --enable-gcc-warnings.
+       * lib/Makefile.am (AM_CFLAGS): New macro.
+       * m4/manywarnings.m4, m4/warnings.m4: New files, from gnulib.
+
 2012-04-09  Glenn Morris  <rgm@gnu.org>
 
        * Makefile.in (leim): Check cd return value.  Pass fewer variables.