diff options
| -rw-r--r-- | Makefile.am | 2 | ||||
| -rw-r--r-- | configure.ac | 22 | ||||
| -rw-r--r-- | m4/compiler.m4 | 40 |
3 files changed, 63 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am index 4c123f2..e9c1608 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1,6 +1,6 @@ ACLOCAL_AMFLAGS = -I m4 -AM_CPPFLAGS = -D_GNU_SOURCE -I$(top_srcdir)/include +AM_CPPFLAGS = $(WARN_CFLAGS) -D_GNU_SOURCE -std=gnu99 -I$(top_srcdir)/include if WITHOUT_XATTR AM_CPPFLAGS += -DWITHOUT_XATTR diff --git a/configure.ac b/configure.ac index 8db281d..c1cf1d1 100644 --- a/configure.ac +++ b/configure.ac @@ -24,6 +24,28 @@ AC_DISABLE_STATIC AC_PROG_CC AC_PROG_INSTALL +## compiler warnings +UL_WARN_ADD([-Wall]) +UL_WARN_ADD([-Wextra]) +UL_WARN_ADD([-Wunused]) +UL_WARN_ADD([-Wmissing-prototypes]) +UL_WARN_ADD([-Wmissing-declarations]) +UL_WARN_ADD([-Wwrite-strings]) +UL_WARN_ADD([-Wjump-misses-init]) +UL_WARN_ADD([-Wuninitialized]) +UL_WARN_ADD([-Winit-self]) +UL_WARN_ADD([-Wlogical-op]) +UL_WARN_ADD([-Wunused-but-set-parameter]) +UL_WARN_ADD([-Wunused-but-set-variable]) +UL_WARN_ADD([-Wunused-parameter]) +UL_WARN_ADD([-Wunused-result]) +UL_WARN_ADD([-Wunused-variable]) + +UL_WARN_ADD([-Wno-shadow]) +UL_WARN_ADD([-Wno-sign-compare]) + +AC_SUBST([WARN_CFLAGS]) + ###### handle configure switches, select dependencies ###### need_clock_gettime="no" diff --git a/m4/compiler.m4 b/m4/compiler.m4 new file mode 100644 index 0000000..058c73f --- /dev/null +++ b/m4/compiler.m4 @@ -0,0 +1,40 @@ +dnl Copyright (C) 2008-2011 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Simon Josefsson +dnl -- derivated from coreutils m4/warnings.m4 + +# UL_AS_VAR_APPEND(VAR, VALUE) +# ---------------------------- +# Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. +m4_ifdef([AS_VAR_APPEND], +[m4_copy([AS_VAR_APPEND], [UL_AS_VAR_APPEND])], +[m4_define([UL_AS_VAR_APPEND], +[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) + +# UL_ADD_WARN(COMPILER_OPTION [, VARNAME]) +# ------------------------ +# Adds parameter to WARN_CFLAGS (or to $VARNAME) if the compiler supports it. +AC_DEFUN([UL_WARN_ADD], [ + m4_define([warnvarname], m4_default([$2],WARN_CFLAGS)) + AS_VAR_PUSHDEF([ul_Warn], [ul_cv_warn_$1])dnl + AC_CACHE_CHECK([whether compiler handles $1], m4_defn([ul_Warn]), [ + # store AC_LANG_WERROR status, then turn it on + save_ac_[]_AC_LANG_ABBREV[]_werror_flag="${ac_[]_AC_LANG_ABBREV[]_werror_flag}" + AC_LANG_WERROR + + ul_save_CPPFLAGS="$CPPFLAGS" + CPPFLAGS="-Werror ${CPPFLAGS} $1" + AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], + [AS_VAR_SET(ul_Warn, [yes])], + [AS_VAR_SET(ul_Warn, [no])]) + # restore AC_LANG_WERROR + ac_[]_AC_LANG_ABBREV[]_werror_flag="${save_ac_[]_AC_LANG_ABBREV[]_werror_flag}" + + CPPFLAGS="$ul_save_CPPFLAGS" + ]) + AS_VAR_IF(ul_Warn, [yes], [UL_AS_VAR_APPEND(warnvarname, [" $1"])]) +]) + |