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CONFIGURE: Add option to build as C++11.

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This commit is contained in:
Johannes Schickel 2013-01-09 07:53:21 +01:00
parent cc0b8594ce
commit d198ccac26
1 changed files with 41 additions and 9 deletions
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50
configure vendored
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@ -123,6 +123,7 @@ _libunity=auto
_debug_build=auto
_release_build=auto
_optimizations=auto
_use_cxx11=no
_verbose_build=no
_text_console=no
_mt32emu=yes
@ -870,6 +871,7 @@ Game engines:
The values of <engine name> for these options are as follows:
$engines_help
Optional Features:
--enable-c++11 build as C++11 if the compiler allows that
--disable-debug disable building with debugging symbols
--enable-Werror treat warnings as errors
--enable-release enable building in release mode (this activates
@ -1109,6 +1111,12 @@ for ac_option in $@; do
--backend=*)
_backend=`echo $ac_option | cut -d '=' -f 2`
;;
--enable-c++11)
_use_cxx11=yes
;;
--disable-c++11)
_use_cxx11=no
;;
--enable-debug)
_debug_build=yes
;;
@ -1694,6 +1702,18 @@ if test "$cxx_verc_fail" = yes ; then
exit 1
fi
#
# Check whether the compiler supports C++11
#
have_cxx11=no
cat > $TMPC << EOF
int main(int argc, char *argv[]) { if (argv == nullptr) return -1; else return 0; }
EOF
cc_check -std=c++11 && have_cxx11=yes
if test "$_use_cxx11" = "yes" ; then
_use_cxx11=$have_cxx11
fi
#
# Setup compiler specific CXXFLAGS now that we know the compiler version.
# Foremost, this means enabling various warnings.
@ -1701,15 +1721,18 @@ fi
#
if test "$have_gcc" = yes ; then
if test "$_cxx_major" -ge "3" ; then
case $_host_os in
# newlib-based system include files suppress non-C89 function
# declarations under __STRICT_ANSI__
amigaos* | android | bada | dreamcast | ds | gamecube | mingw* | n64 | psp | ps2 | ps3 | wii | wince )
;;
*)
CXXFLAGS="$CXXFLAGS -ansi"
;;
esac
# Try to use ANSI mode when C++11 is disabled.
if test "$_use_cxx11" = "no" ; then
case $_host_os in
# newlib-based system include files suppress non-C89 function
# declarations under __STRICT_ANSI__
amigaos* | android | bada | dreamcast | ds | gamecube | mingw* | n64 | psp | ps2 | ps3 | wii | wince )
;;
*)
CXXFLAGS="$CXXFLAGS -ansi"
;;
esac
fi
CXXFLAGS="$CXXFLAGS -W -Wno-unused-parameter"
add_line_to_config_mk 'HAVE_GCC3 = 1'
add_line_to_config_mk 'CXX_UPDATE_DEP_FLAG = -MMD -MF "$(*D)/$(DEPDIR)/$(*F).d" -MQ "$@" -MP'
@ -1725,6 +1748,15 @@ elif test "$have_icc" = yes ; then
add_line_to_config_mk 'CXX_UPDATE_DEP_FLAG = -MMD -MF "$(*D)/$(DEPDIR)/$(*F).d" -MQ "$@" -MP'
fi;
#
# Update status about C++11 mode
#
echo_n "Building as C++11... "
if test "$_use_cxx11" = "yes" ; then
CXXFLAGS="$CXXFLAGS -std=c++11"
fi
echo $_use_cxx11
# By default, we add -pedantic to the CXXFLAGS to catch some potentially
# non-portable constructs, like use of GNU extensions.
# However, some platforms use GNU extensions in system header files, so