# serial 25
+dnl
+dnl Check for support for D_FORTIFY_SOURCE=2
+dnl
+
+AC_DEFUN([AC_CC_D_FORTIFY_SOURCE],[
+ AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+ if test $enable_hardening = yes; then
+ case "$host" in
+ *)
+ gl_COMPILER_OPTION_IF([-O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2], [
+ CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
+ ],
+ [],
+ [AC_LANG_PROGRAM()]
+ )
+ esac
+ fi
+])
+
+dnl * gcc specific options
+AC_DEFUN([DOVECOT_CFLAGS],[
+ if test "x$ac_cv_c_compiler_gnu" = "xyes"; then
+ # -Wcast-qual -Wcast-align -Wconversion -Wunreachable-code # too many warnings
+ # -Wstrict-prototypes -Wredundant-decls # may give warnings in some systems
+ # -Wmissing-format-attribute -Wmissing-noreturn -Wwrite-strings # a couple of warnings
+ CFLAGS="$CFLAGS -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast"
+
+ if test "$have_clang" = "yes"; then
+ AC_TRY_COMPILE([
+ #if __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 3)
+ # error new clang
+ #endif
+ ],,,[
+ # clang 3.3+ unfortunately this gives warnings with hash.h
+ CFLAGS="$CFLAGS -Wno-duplicate-decl-specifier"
+ ])
+ else
+ # This is simply to avoid warning when building strftime() wrappers..
+ CFLAGS="$CFLAGS -fno-builtin-strftime"
+ fi
+
+ AC_TRY_COMPILE([
+ #if __GNUC__ < 4
+ # error old gcc
+ #endif
+ ],,[
+ # gcc4
+ CFLAGS="$CFLAGS -Wstrict-aliasing=2"
+ ])
+
+ # Use std=gnu99 if we have new enough gcc
+ old_cflags=$CFLAGS
+ CFLAGS="-std=gnu99"
+ AC_TRY_COMPILE([
+ ],, [
+ CFLAGS="$CFLAGS $old_cflags"
+ ], [
+ CFLAGS="$old_cflags"
+ ])
+
+ fi
+ if test "$have_clang" = "yes"; then
+ # clang specific options
+ if test "$want_devel_checks" = "yes"; then
+ # FIXME: enable once md[45], sha[12] can be compiled without
+ #CFLAGS="$CFLAGS -fsanitize=integer,undefined -ftrapv"
+ :
+ fi
+ fi
+])
+
+AC_DEFUN([AC_LD_WHOLE_ARCHIVE], [
+ LD_WHOLE_ARCHIVE=
+ LD_NO_WHOLE_ARCHIVE=
+ AC_MSG_CHECKING([for linker option to include whole archive])
+ ld_help="`$CC -Wl,-help 2>&1`"
+ case "$ld_help" in
+ *"--whole-archive"*)
+ LD_WHOLE_ARCHIVE="--whole-archive"
+ LD_NO_WHOLE_ARCHIVE="--no-whole-archive"
+ ;;
+ esac
+ AS_IF([test "x$LD_WHOLE_ARCHIVE" != "x"],
+ [AC_MSG_RESULT([-Wl,$LD_WHOLE_ARCHIVE])],
+ [AC_MSG_RESULT([not supported])]
+ )
+ AC_SUBST([LD_WHOLE_ARCHIVE])
+ AC_SUBST([LD_NO_WHOLE_ARCHIVE])
+ AM_CONDITIONAL([HAVE_WHOLE_ARCHIVE], [test "x$LD_WHOLE_ARCHIVE" != "x"])
+])
+
+dnl
+dnl Check for -z now and -z relro linker flags
+dnl
+dnl Copyright (C) 2013 Red Hat, Inc.
+dnl
+dnl This library is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU Lesser General Public
+dnl License as published by the Free Software Foundation; either
+dnl version 2.1 of the License, or (at your option) any later version.
+dnl
+dnl This library is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with this library. If not, see
+dnl <http://www.gnu.org/licenses/>.
+dnl
+
+AC_DEFUN([AC_LD_RELRO],[
+ RELRO_LDFLAGS=
+ if test $enable_hardening = yes; then
+ AC_MSG_CHECKING([for how to force completely read-only GOT table])
+ ld_help=`$CC -Wl,-help 2>&1`
+ case $ld_help in
+ *"-z relro"*) RELRO_LDFLAGS="-Wl,-z -Wl,relro" ;;
+ esac
+ case $ld_help in
+ *"-z now"*) RELRO_LDFLAGS="$RELRO_LDFLAGS -Wl,-z -Wl,now" ;;
+ esac
+ AS_IF([test "x$RELRO_LDFLAGS" != "x"],
+ [AC_MSG_RESULT([$RELRO_LDFLAGS])],
+ [AC_MSG_RESULT([unknown])]
+ )
+ fi
+ AC_SUBST([RELRO_LDFLAGS])
+])
+
+dnl
+dnl Check for support for position independent executables
+dnl
+dnl Copyright (C) 2013 Red Hat, Inc.
+dnl
+dnl This library is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU Lesser General Public
+dnl License as published by the Free Software Foundation; either
+dnl version 2.1 of the License, or (at your option) any later version.
+dnl
+dnl This library is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with this library. If not, see
+dnl <http://www.gnu.org/licenses/>.
+dnl
+
+AC_DEFUN([AC_CC_PIE],[
+ AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+ PIE_CFLAGS=
+ PIE_LDFLAGS=
+
+ if test $enable_hardening = yes; then
+ OLD_CFLAGS=$CFLAGS
+ case "$host" in
+ *-*-mingw* | *-*-msvc* | *-*-cygwin* )
+ ;; dnl All code is position independent on Win32 target
+ *)
+ CFLAGS="-fPIE -DPIE"
+ gl_COMPILER_OPTION_IF([-pie], [
+ PIE_CFLAGS="-fPIE -DPIE"
+ PIE_LDFLAGS="-pie"
+ ], [
+ dnl some versions of clang require -Wl,-pie instead of -pie
+ gl_COMPILER_OPTION_IF([[-Wl,-pie]], [
+ PIE_CFLAGS="-fPIE -DPIE"
+ PIE_LDFLAGS="-Wl,-pie"
+ ], [AC_MSG_RESULT([not supported])],
+ [AC_LANG_PROGRAM()]
+ )
+ ],
+ [AC_LANG_PROGRAM()]
+ )
+ esac
+ CFLAGS=$OLD_CFLAGS
+ fi
+ AC_SUBST([PIE_CFLAGS])
+ AC_SUBST([PIE_LDFLAGS])
+])
+
+dnl
+dnl Check for support for Retpoline
+dnl
+
+AC_DEFUN([AC_CC_RETPOLINE],[
+ AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+ if test $enable_hardening = yes; then
+ case "$host" in
+ *)
+ gl_COMPILER_OPTION_IF([-mfunction-return=thunk -mindirect-branch=thunk], [
+ CFLAGS="$CFLAGS -mfunction-return=thunk -mindirect-branch=thunk"
+ ],
+ [],
+ [AC_LANG_PROGRAM()]
+ )
+ esac
+ fi
+])
+
+dnl
+dnl Check for support for -fstack-protector or -strong
+dnl
+
+AC_DEFUN([AC_CC_F_STACK_PROTECTOR],[
+ AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+ if test $enable_hardening = yes; then
+ case "$host" in
+ *)
+ gl_COMPILER_OPTION_IF([-fstack-protector-strong], [
+ CFLAGS="$CFLAGS -fstack-protector-strong"
+ ],
+ [
+ gl_COMPILER_OPTION_IF([-fstack-protector], [
+ CFLAGS="$CFLAGS -fstack-protector"
+ ], [], [AC_LANG_PROGRAM()])
+ ],
+ [AC_LANG_PROGRAM()]
+ )
+ esac
+ fi
+])
+
AC_DEFUN([DC_DOVECOT_MODULEDIR],[
AC_ARG_WITH(moduledir,
[ --with-moduledir=DIR Base directory for dynamically loadable modules],
fi
fi
])
+# warnings.m4 serial 11
+dnl Copyright (C) 2008-2015 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
+
+# gl_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], [gl_AS_VAR_APPEND])],
+[m4_define([gl_AS_VAR_APPEND],
+[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
+
+
+# gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED],
+# [PROGRAM = AC_LANG_PROGRAM()])
+# -----------------------------------------------------------------
+# Check if the compiler supports OPTION when compiling PROGRAM.
+#
+# FIXME: gl_Warn must be used unquoted until we can assume Autoconf
+# 2.64 or newer.
+AC_DEFUN([gl_COMPILER_OPTION_IF],
+[AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl
+AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl
+AS_LITERAL_IF([$1],
+ [m4_pushdef([gl_Positive], m4_bpatsubst([$1], [^-Wno-], [-W]))],
+ [gl_positive="$1"
+case $gl_positive in
+ -Wno-*) gl_positive=-W`expr "X$gl_positive" : 'X-Wno-\(.*\)'` ;;
+esac
+m4_pushdef([gl_Positive], [$gl_positive])])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [
+ gl_save_compiler_FLAGS="$gl_Flags"
+ gl_AS_VAR_APPEND(m4_defn([gl_Flags]),
+ [" $gl_unknown_warnings_are_errors ]m4_defn([gl_Positive])["])
+ AC_LINK_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])],
+ [AS_VAR_SET(gl_Warn, [yes])],
+ [AS_VAR_SET(gl_Warn, [no])])
+ gl_Flags="$gl_save_compiler_FLAGS"
+])
+AS_VAR_IF(gl_Warn, [yes], [$2], [$3])
+m4_popdef([gl_Positive])dnl
+AS_VAR_POPDEF([gl_Flags])dnl
+AS_VAR_POPDEF([gl_Warn])dnl
+])
+
+# gl_UNKNOWN_WARNINGS_ARE_ERRORS
+# ------------------------------
+# Clang doesn't complain about unknown warning options unless one also
+# specifies -Wunknown-warning-option -Werror. Detect this.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS],
+[gl_COMPILER_OPTION_IF([-Werror -Wunknown-warning-option],
+ [gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'],
+ [gl_unknown_warnings_are_errors=])])
+
+# gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS],
+# [PROGRAM = AC_LANG_PROGRAM()])
+# ---------------------------------------------
+# Adds parameter to WARN_CFLAGS if the compiler supports it when
+# compiling PROGRAM. For example, gl_WARN_ADD([-Wparentheses]).
+#
+# If VARIABLE is a variable name, AC_SUBST it.
+AC_DEFUN([gl_WARN_ADD],
+[AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+gl_COMPILER_OPTION_IF([$1],
+ [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])],
+ [],
+ [$3])
+m4_ifval([$2],
+ [AS_LITERAL_IF([$2], [AC_SUBST([$2])])],
+ [AC_SUBST([WARN_CFLAGS])])dnl
+])
+
+# Local Variables:
+# mode: autoconf
+# End:
+dnl * clang check
+AC_DEFUN([CC_CLANG],[
+have_clang=no
+if $CC -dM -E -x c /dev/null | grep __clang__ > /dev/null 2>&1; then
+ have_clang=yes
+fi
+])
+++ /dev/null
-# warnings.m4 serial 11
-dnl Copyright (C) 2008-2015 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
-
-# gl_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], [gl_AS_VAR_APPEND])],
-[m4_define([gl_AS_VAR_APPEND],
-[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
-
-
-# gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED],
-# [PROGRAM = AC_LANG_PROGRAM()])
-# -----------------------------------------------------------------
-# Check if the compiler supports OPTION when compiling PROGRAM.
-#
-# FIXME: gl_Warn must be used unquoted until we can assume Autoconf
-# 2.64 or newer.
-AC_DEFUN([gl_COMPILER_OPTION_IF],
-[AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl
-AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl
-AS_LITERAL_IF([$1],
- [m4_pushdef([gl_Positive], m4_bpatsubst([$1], [^-Wno-], [-W]))],
- [gl_positive="$1"
-case $gl_positive in
- -Wno-*) gl_positive=-W`expr "X$gl_positive" : 'X-Wno-\(.*\)'` ;;
-esac
-m4_pushdef([gl_Positive], [$gl_positive])])dnl
-AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [
- gl_save_compiler_FLAGS="$gl_Flags"
- gl_AS_VAR_APPEND(m4_defn([gl_Flags]),
- [" $gl_unknown_warnings_are_errors ]m4_defn([gl_Positive])["])
- AC_LINK_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])],
- [AS_VAR_SET(gl_Warn, [yes])],
- [AS_VAR_SET(gl_Warn, [no])])
- gl_Flags="$gl_save_compiler_FLAGS"
-])
-AS_VAR_IF(gl_Warn, [yes], [$2], [$3])
-m4_popdef([gl_Positive])dnl
-AS_VAR_POPDEF([gl_Flags])dnl
-AS_VAR_POPDEF([gl_Warn])dnl
-])
-
-# gl_UNKNOWN_WARNINGS_ARE_ERRORS
-# ------------------------------
-# Clang doesn't complain about unknown warning options unless one also
-# specifies -Wunknown-warning-option -Werror. Detect this.
-AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS],
-[gl_COMPILER_OPTION_IF([-Werror -Wunknown-warning-option],
- [gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'],
- [gl_unknown_warnings_are_errors=])])
-
-# gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS],
-# [PROGRAM = AC_LANG_PROGRAM()])
-# ---------------------------------------------
-# Adds parameter to WARN_CFLAGS if the compiler supports it when
-# compiling PROGRAM. For example, gl_WARN_ADD([-Wparentheses]).
-#
-# If VARIABLE is a variable name, AC_SUBST it.
-AC_DEFUN([gl_WARN_ADD],
-[AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
-gl_COMPILER_OPTION_IF([$1],
- [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])],
- [],
- [$3])
-m4_ifval([$2],
- [AS_LITERAL_IF([$2], [AC_SUBST([$2])])],
- [AC_SUBST([WARN_CFLAGS])])dnl
-])
-
-# Local Variables:
-# mode: autoconf
-# End:
projects / thirdparty / dovecot / core.git / commitdiff
