## by default we want the -Wall level
SXE_CHECK_COMPILER_FLAGS([-Wall], [warnflags="-Wall"])
- ## If this stays nil, it will be set to warnflags before use.
- dnl Following warning flags are known to work well.
- if test "$__SUNPRO_C" = "yes"; then
- warnflags=""
-
- elif test "$CC" = "xlc"; then
- warnflags="-qinfo"
-
- elif test "$GCC" = "yes" -a \
- "$with_maximum_warning_output" = "yes"; then
- warnflags="-Wall"
-
- ## Yuck, bad compares have been worth at
- ## least 3 crashes!
- ## Warnings about char subscripts are pretty
- ## pointless, though,
- ## and we use them in various places.
- SXE_CHECK_COMPILER_FLAGS([-Wsign-compare], [
- warnflags="$warnflags -Wsign-compare"])
- SXE_CHECK_COMPILER_FLAGS([-Wno-char-subscripts], [
- warnflags="$warnflags -Wno-char-subscripts"])
- SXE_CHECK_COMPILER_FLAGS([-Wundef], [
- warnflags="$warnflags -Wundef"])
-
- ## too much at the moment, we rarely define protos
- #warnflags="$warnflags -Wmissing-prototypes -Wstrict-prototypes"
- SXE_CHECK_COMPILER_FLAGS([-Wpacked], [
- warnflags="$warnflags -Wpacked"])
-
- ## glibc is intentionally not `-Wpointer-arith'-clean.
- ## Ulrich Drepper has rejected patches to fix
- ## the glibc header files.
- ## we dont care
- SXE_CHECK_COMPILER_FLAGS([-Wpointer-arith], [
- warnflags="$warnflags -Wpointer-arith"])
-
- SXE_CHECK_COMPILER_FLAGS([-Wshadow], [
- warnflags="$warnflags -Wshadow"])
-
- ## our code lacks declarations almost all the time
- SXE_CHECK_COMPILER_FLAGS([-Wmissing-declarations], [
- warnflags="$warnflags -Wmissing-declarations"])
-
- case "$compiler_version" in
- gcc*\ 4.5.0*)
- ## gcc 4.5.0 cannot cope with -Winline
- ;;
- *)
- SXE_CHECK_COMPILER_FLAGS([-Winline], [
- warnflags="$warnflags -Winline"])
- ;;
- esac
-
- SXE_CHECK_COMPILER_FLAGS([-Wbad-function-cast], [
- warnflags="$warnflags -Wbad-function-cast"])
- SXE_CHECK_COMPILER_FLAGS([-Wcast-qual], [
- warnflags="$warnflags -Wcast-qual"])
- SXE_CHECK_COMPILER_FLAGS([-Wcast-align], [
- warnflags="$warnflags -Wcast-align"])
-
- ## warn about incomplete switches
- SXE_CHECK_COMPILER_FLAGS([-Wswitch], [
- warnflags="$warnflags -Wswitch"])
- SXE_CHECK_COMPILER_FLAGS([-Wswitch-default], [
- warnflags="$warnflags -Wswitch-default"])
- SXE_CHECK_COMPILER_FLAGS([-Wswitch-enum], [
- warnflags="$warnflags -Wswitch-enum"])
-
- if test "$sxe_cv_c_flags__save_temps" = "yes"; then
- : ##warnflags="$warnflags -save-temps"
- fi
-
- ## for upcoming openmp support
- ## which is of course configurable but shut the compiler
- ## up in case we dont want/have omp, pragmas are a PITA
- SXE_CHECK_COMPILER_FLAGS([-Wnopragma], [
- warnflags="$warnflags -Wnopragma"])
-
- elif test "$__ICC" = "yes" -a \
- "$with_maximum_warning_output" = "yes"; then
- SXE_CHECK_COMPILER_FLAGS([-Wunused-function], [
- warnflags="$warnflags -Wunused-function"])
- SXE_CHECK_COMPILER_FLAGS([-Wunused-variable], [
- warnflags="$warnflags -Wunused-variable"])
- SXE_CHECK_COMPILER_FLAGS([-Wunknown-pragmas], [
- warnflags="$warnflags -Wunknown-pragmas"])
- SXE_CHECK_COMPILER_FLAGS([-Wuninitialized], [
- warnflags="$warnflags -Wuninitialized"])
- SXE_CHECK_COMPILER_FLAGS([-Wshadow], [
- warnflags="$warnflags -Wshadow"])
- SXE_CHECK_COMPILER_FLAGS([-Wmissing-declarations], [
- warnflags="$warnflags -Wmissing-declarations"])
- SXE_CHECK_COMPILER_FLAGS([-Wmissing-prototypes], [
- warnflags="$warnflags -Wmissing-prototypes"])
- SXE_CHECK_COMPILER_FLAGS([-Wreorder], [
- warnflags="$warnflags -Wreorder"])
- SXE_CHECK_COMPILER_FLAGS([-Wdeprecated], [
- warnflags="$warnflags -Wdeprecated"])
- SXE_CHECK_COMPILER_FLAGS([-Wnopragma], [
- warnflags="$warnflags -Wnopragma"])
- fi
+ SXE_CHECK_COMPILER_FLAGS([-qinfo], [
+ warnflags="${warnflags} -qinfo"])
+
+ ## Yuck, bad compares have been worth at
+ ## least 3 crashes!
+ ## Warnings about char subscripts are pretty
+ ## pointless, though,
+ ## and we use them in various places.
+ SXE_CHECK_COMPILER_FLAGS([-Wsign-compare], [
+ warnflags="$warnflags -Wsign-compare"])
+ SXE_CHECK_COMPILER_FLAGS([-Wno-char-subscripts], [
+ warnflags="$warnflags -Wno-char-subscripts"])
+ SXE_CHECK_COMPILER_FLAGS([-Wundef], [
+ warnflags="$warnflags -Wundef"])
+
+ ## too much at the moment, we rarely define protos
+ #warnflags="$warnflags -Wmissing-prototypes -Wstrict-prototypes"
+ SXE_CHECK_COMPILER_FLAGS([-Wpacked], [
+ warnflags="$warnflags -Wpacked"])
+
+ ## glibc is intentionally not `-Wpointer-arith'-clean.
+ ## Ulrich Drepper has rejected patches to fix
+ ## the glibc header files.
+ ## we dont care
+ SXE_CHECK_COMPILER_FLAGS([-Wpointer-arith], [
+ warnflags="$warnflags -Wpointer-arith"])
+
+ SXE_CHECK_COMPILER_FLAGS([-Wshadow], [
+ warnflags="$warnflags -Wshadow"])
+
+ ## our code lacks declarations almost all the time
+ SXE_CHECK_COMPILER_FLAGS([-Wmissing-declarations], [
+ warnflags="$warnflags -Wmissing-declarations"])
+ SXE_CHECK_COMPILER_FLAGS([-Wmissing-prototypes], [
+ warnflags="$warnflags -Wmissing-prototypes"])
+ SXE_CHECK_COMPILER_FLAGS([-Winline], [
+ warnflags="$warnflags -Winline"])
+ SXE_CHECK_COMPILER_FLAGS([-Wbad-function-cast], [
+ warnflags="$warnflags -Wbad-function-cast"])
+ SXE_CHECK_COMPILER_FLAGS([-Wcast-qual], [
+ warnflags="$warnflags -Wcast-qual"])
+ SXE_CHECK_COMPILER_FLAGS([-Wcast-align], [
+ warnflags="$warnflags -Wcast-align"])
+
+ ## warn about incomplete switches
+ SXE_CHECK_COMPILER_FLAGS([-Wswitch], [
+ warnflags="$warnflags -Wswitch"])
+ SXE_CHECK_COMPILER_FLAGS([-Wswitch-default], [
+ warnflags="$warnflags -Wswitch-default"])
+ SXE_CHECK_COMPILER_FLAGS([-Wswitch-enum], [
+ warnflags="$warnflags -Wswitch-enum"])
+
+ ## Wunused's
+ SXE_CHECK_COMPILER_FLAGS([-Wunused-function], [
+ warnflags="$warnflags -Wunused-function"])
+ SXE_CHECK_COMPILER_FLAGS([-Wunused-variable], [
+ warnflags="$warnflags -Wunused-variable"])
+ SXE_CHECK_COMPILER_FLAGS([-Wunused-parameter], [
+ warnflags="$warnflags -Wunused-parameter"])
+ SXE_CHECK_COMPILER_FLAGS([-Wunused-value], [
+ warnflags="$warnflags -Wunused-value"])
+ SXE_CHECK_COMPILER_FLAGS([-Wunused], [
+ warnflags="$warnflags -Wunused"])
+
+ ## icc
+ SXE_CHECK_COMPILER_FLAGS([-Wreorder], [
+ warnflags="$warnflags -Wreorder"])
+ SXE_CHECK_COMPILER_FLAGS([-Wdeprecated], [
+ warnflags="$warnflags -Wdeprecated"])
+ SXE_CHECK_COMPILER_FLAGS([-Wnopragma], [
+ warnflags="$warnflags -Wnopragma"])
## for upcoming libev support
## libev is a warning emitting cow, the developers can't
SXE_CHECK_COMPILER_FLAGS([-fno-strict-aliasing], [
warnflags="$warnflags -fno-strict-aliasing"])
+ ## icc specific
+ SXE_CHECK_COMPILER_FLAGS([-diag-disable 10237], [dnl
+ warnflags="${warnflags} -diag-disable 10237"], [
+ SXE_CHECK_COMPILER_FLAGS([-wd 10237], [dnl
+ warnflags="${warnflags} -wd 10237"])])
+
AC_MSG_CHECKING([for preferred warning flags])
AC_MSG_RESULT([${warnflags}])
])dnl SXE_WARNFLAGS
SXE_CHECK_COMPILER_FLAGS([-nopie],
[featflags="$featflags -nopie"])
+ ## icc and gcc related
+ ## check if some stuff can be staticalised
+ ## actually requires SXE_WARNFLAGS so warnings would be disabled
+ ## that affect the outcome of the following tests
+ SXE_CHECK_COMPILER_FLAGS([-static-intel], [
+ featflags="${featflags} -static-intel"
+ XCCLDFLAGS="${XCCLDFLAGS} -static-intel"], [:], [${SXE_CFLAGS}])
+ SXE_CHECK_COMPILER_FLAGS([-static-libgcc], [
+ featflags="${featflags} -static-libgcc"
+ XCCLDFLAGS="${XCCLDFLAGS} -static-libgcc"], [:], [${SXE_CFLAGS}])
+
+ AC_SUBST([XCCLDFLAGS])
])dnl SXE_FEATFLAGS
##### http://autoconf-archive.cryp.to/ax_check_compiler_flags.html
## renamed the prefix to SXE_
AC_DEFUN([SXE_CHECK_COMPILER_FLAGS], [dnl
+dnl SXE_CHECK_COMPILER_FLAGS(<FLAG>, <ACTION-IF-FOUND>, <ACTION-IF-NOT-FOUND>,
+dnl <ADDITIONAL-FLAGS>)
AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1])
dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
AS_LITERAL_IF([$1], [
AC_CACHE_VAL(AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1), [
sxe_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
- _AC_LANG_PREFIX[]FLAGS="$1"
+ _AC_LANG_PREFIX[]FLAGS="$4 $1"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="yes",
AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="no")
_AC_LANG_PREFIX[]FLAGS=$sxe_save_FLAGS])], [
sxe_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
- _AC_LANG_PREFIX[]FLAGS="$1"
+ _AC_LANG_PREFIX[]FLAGS="$4 $1"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
eval AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="yes",
eval AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="no")
])dnl SXE_CHECK_COMPILER_FLAGS
+AC_DEFUN([SXE_CHECK_COMPILER_XFLAG], [dnl
+ ## if libtool then
+ case "${LD}" in
+ *"libtool"*)
+ SXE_CHECK_COMPILER_FLAGS([-XCClinker], [
+ XFLAG="-XCClinker"], [
+ XFLAG=""])
+ ;;
+ *"ld"*)
+ ## no XFLAG needed
+ XFLAG=""
+ ;;
+ *)
+ SXE_CHECK_COMPILER_FLAGS([-Xlinker], [
+ XFLAG="-Xlinker"], [
+ XFLAG=""])
+ ;;
+ esac
+])dnl SXE_CHECK_COMPILER_XFLAG
+
+
AC_DEFUN([SXE_CHECK_CPU], [dnl
case "$host_cpu" in
dnl (
SXE_DEBUGFLAGS
SXE_WARNFLAGS
SXE_OPTIFLAGS
+ SXE_CFLAGS="$debugflags $optiflags $warnflags"
+
SXE_FEATFLAGS
SXE_CFLAGS="$debugflags $featflags $optiflags $warnflags"
+
elif test "$CFLAGS_uspecified_p" = "no" -o \
"$ac_test_CFLAGS" != "set"; then
SXE_DEBUGFLAGS
SXE_WARNFLAGS
- SXE_FEATFLAGS
## the old settings
## Following values of CFLAGS are known to work well.
## Should we take debugging options into consideration?
- if test "$GCC" = "yes"; then
- optiflags="-O3"
- elif test "$__SUNPRO_C" = "yes"; then
- case "$opsys" in
- sol2 ) optiflags="-xO4" ;;
- sunos4* ) optiflags="-xO2" ;;
- esac
- elif test "$__DECC" = "yes"; then
- optiflags="-O3"
- elif test "$CC" = "xlc"; then
- optiflags="-g -O3 -qstrict -qnoansialias -qlibansi -qro -qmaxmem=20000"
- elif test "$__ICC" = "yes"; then
- optiflags="-g -O3 -Ob2"
- ### Add optimal CFLAGS support for other compilers HERE!
- else
- optiflags="-O" ## The only POSIX-approved flag
+ SXE_CHECK_COMPILER_FLAGS([-xO4], [dnl
+ ## ah, it's sunos4*
+ optiflags="${optiflags} -xO4"], [dnl
+ SXE_CHECK_COMPILER_FLAGS([-xO2], [dnl
+ ## oh, a sol2
+ optiflags="${optiflags} -xO2"])])
+ SXE_CHECK_COMPILER_FLAGS([-O3], [dnl
+ ## gcc, icc, decc, et al.
+ optiflags="${optiflags} -O3"])
+
+ ## xlc specific
+ SXE_CHECK_COMPILER_FLAGS([-qnoansialias -qlibansi], [dnl
+ optiflags="${optiflags} -qnoansialias -qlibansi"])
+ SXE_CHECK_COMPILER_FLAGS([-qro -qmaxmem=20000], [dnl
+ optiflags="${optiflags} -qro -qmaxmem=20000"])
+
+ ## icc specific
+ SXE_CHECK_COMPILER_FLAGS([-inline-level=2], [dnl
+ ## ah, one of the new flavours, tasty
+ optiflags="${optiflags} -inline-level=2"], [dnl
+ SXE_CHECK_COMPILER_FLAGS([-Ob2], [dnl
+ ## deprecated nowadays
+ optiflags="${optiflags} -Ob2"])])
+
+ ## final check
+ if test -z "${optiflags}"; then
+ SXE_CHECK_COMPILER_FLAGS([-O], [dnl
+ ## The only POSIX-approved flag
+ optiflags="-O"])
fi
+ SXE_CFLAGS="$debugflags $optiflags $warnflags"
+
+ SXE_FEATFLAGS
SXE_CFLAGS="$debugflags $featflags $optiflags $warnflags"
else
SXE_CFLAGS=${USER_CFLAGS}
NOTE: -C <directory> option is not available on all systems
])
-
])dnl SXE_CHECK_CFLAGS
popdef([LIBNAME])
])dnl SXE_CC_LIBRARY_LOCATION
+
+AC_DEFUN([SXE_CHECK_ANON_STRUCTS], [
+ AC_MSG_CHECKING([whether C compiler can cope with anonymous structures])
+ AC_LANG_PUSH(C)
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+union __test_u {
+ int i;
+ struct {
+ char c;
+ char padc;
+ short int pads;
+ };
+};
+ ]], [[
+ union __test_u tmp = {.c = '4'};
+ ]])], [
+ sxe_cv_have_anon_structs="yes"
+ ], [
+ sxe_cv_have_anon_structs="no"
+ ])
+ AC_MSG_RESULT([${sxe_cv_have_anon_structs}])
+
+ if test "${sxe_cv_have_anon_structs}" = "yes"; then
+ AC_DEFINE([HAVE_ANON_STRUCTS], [1], [
+ Whether c1x anon structs work])
+ $1
+ :
+ else
+ $2
+ :
+ fi
+ AC_LANG_POP()
+])dnl SXE_CHECK_ANON_STRUCTS
+
dnl sxe-compiler.m4 ends here
dnl sxe-linker.m4 -- Linker stuff, esp. dynamic linking
dnl needed for emodules for one
+AC_DEFUN([SXE_CHECK_LINKER_FLAGS], [dnl
+dnl just like SXE_CHECK_COMPILER_FLAGS but calls the linker
+dnl SXE_CHECK_LINKER_FLAGS(<FLAG>, <ACTION-IF-FOUND>, <ACTION-IF-NOT-FOUND>,
+dnl <ADDITIONAL-FLAGS>)
+ AC_MSG_CHECKING([whether linker accepts $1])
+
+ dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
+ SXE_LANG_WERROR([push+on])
+ AS_LITERAL_IF([$1], [
+ AC_CACHE_VAL(AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1), [
+ sxe_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
+ _AC_LANG_PREFIX[]FLAGS="$4 ${XFLAG} $1"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+ AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="yes",
+ AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="no")
+ _AC_LANG_PREFIX[]FLAGS=$sxe_save_FLAGS])], [
+ sxe_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
+ _AC_LANG_PREFIX[]FLAGS="$4 ${XFLAG} $1"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+ eval AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="yes",
+ eval AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)="no")
+ _AC_LANG_PREFIX[]FLAGS=$sxe_save_FLAGS])
+ eval sxe_check_linker_flags=$AS_TR_SH(sxe_cv_[]_AC_LANG_ABBREV[]_flags_$1)
+ SXE_LANG_WERROR([pop])
+
+ AC_MSG_RESULT([$sxe_check_linker_flags])
+ if test "$sxe_check_linker_flags" = "yes"; then
+ m4_default([$2], :)
+ else
+ m4_default([$3], :)
+ fi
+])dnl SXE_CHECK_LINKER_FLAGS
+
AC_DEFUN([SXE_CHECK_LD_ZFLAG], [dnl
pushdef([LD_ZFLAG], [$1])
pushdef([cv_zflag], [sxe_cv_ld__z_]translit(LD_ZFLAG,[-.=],[___]))
- AC_CACHE_CHECK([whether linker supports -z ]LD_ZFLAG[],
- []cv_zflag[], [_SXE_CHECK_LD_ZFLAG(LD_ZFLAG)])
+ SXE_CHECK_LINKER_FLAGS([-z ]LD_ZFLAG[])
+
+dnl Use the check that actually calls the compiler/linker to examine the flags
+dnl AC_CACHE_CHECK([whether linker supports -z ]LD_ZFLAG[],
+dnl []cv_zflag[], [_SXE_CHECK_LD_ZFLAG(LD_ZFLAG)])
popdef([cv_zflag])
popdef([LD_ZFLAG])
popdef([LD_ZFLAG])
])dnl _SXE_CHECK_LD_ZFLAG
-AC_DEFUN([SXE_CHECK_LD_NOCOMBRELOC], [dnl
- SXE_CHECK_LD_ZFLAG([nocombreloc])
-])dnl SXE_CHECK_LD_NOCOMBRELOC
-
+AC_DEFUN([SXE_CHECK_LDFLAGS], [dnl
+ AC_REQUIRE([SXE_CHECK_COMPILER_XFLAG])
-AC_DEFUN([SXE_CHECK_LINKER_FLAGS], [dnl
## relocation
SXE_CHECK_LD_ZFLAG([combreloc])
SXE_CHECK_LD_ZFLAG([nocombreloc])
## binding policy
SXE_CHECK_LD_ZFLAG([lazy])
SXE_CHECK_LD_ZFLAG([now])
-])dnl SXE_CHECK_LINKER_FLAGS
+
+ LDFLAGS="${ldflags} ${ac_cv_env_LDFLAGS_value}"
+ AC_MSG_CHECKING([for preferred LDFLAGS])
+ AC_MSG_RESULT([${LDFLAGS}])
+
+ AC_MSG_NOTICE([
+If you wish to ADD your own flags you want to stop here and rerun the
+configure script like so:
+ configure LDFLAGS=<to-be-added-flags>
+
+You can always override the determined LDFLAGS, partially or totally,
+using
+ make -C <directory> LDFLAGS=<your-own-flags> [target]
+or
+ make LDFLAGS=<your-own-flags> [target]
+respectively
+
+NOTE: -C <directory> option is not available on all systems
+ ])
+])dnl SXE_CHECK_LDFLAGS
AC_DEFUN([SXE_PREPEND_LINKER_FLAG], [dnl
## a convenience function to add such linker flags to variables
projects / sxemacs / commitdiff