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Add more compiler warning flags

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Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
This commit is contained in:
David Oberhollenzer 2018-04-12 05:41:09 +02:00
parent 6cf0a254cd
commit 82cd18107f
3 changed files with 65 additions and 1 deletions
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2
Makefile.am
View file

@ -1,7 +1,7 @@
ACLOCAL_AMFLAGS = -I m4
AM_CPPFLAGS = -D_GNU_SOURCE -I$(top_srcdir)/lib/include
AM_CFLAGS = -std=c99 -pedantic -Wall -Wextra
AM_CFLAGS = -std=c99 $(WARN_CFLAGS)
sbin_PROGRAMS =
noinst_LIBRARIES =

24
configure.ac
View file

@ -21,6 +21,30 @@ AC_ARG_WITH([pygos],
[AM_CONDITIONAL([PYGOSCFG], [true])])
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([-Wduplicated-cond])
UL_WARN_ADD([-Wduplicated-branches])
UL_WARN_ADD([-Wrestrict])
UL_WARN_ADD([-Wnull-dereference])
UL_WARN_ADD([-pedantic])
AC_SUBST([WARN_CFLAGS])
AC_CONFIG_HEADERS([lib/include/config.h])
AC_DEFINE_DIR(SVCDIR, sysconfdir/init.d, [Startup service directory])
AC_DEFINE_DIR(TEMPLATEDIR, datadir/init, [Service template directory])

40
m4/compiler.m4 Normal file
View file

@ -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"])])
])