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Cleanup autoconf compiler support
Get rid of some old useless compiler checking code Do not touch CXXFLAGS and friends, only the AM_* version Let the gcc-related options for latest known version be the default (assume they will still be fine in future versions) Try to take clang in account in a better way (to be continued): * use proper option for C++11, * use -Wno-deprecated-register in this case because Qt has a lot of these * define version as being clang for internal testing (there is no real way to get the clang version)
This commit is contained in:
Jean-Marc Lasgouttes
parent
486c7cc069
commit
ff42fea8ab
@ -133,26 +133,6 @@ done
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])dnl
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AC_DEFUN([LYX_PROG_CXX_WORKS],
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[rm -f conftest.C
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cat >conftest.C <<EOF
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class foo {
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// we require the mutable keyword
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mutable int bar;
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};
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// we require namespace support
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namespace baz {
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int bar;
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}
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int main() {
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return(0);
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}
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EOF
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$CXX -c $CXXFLAGS $CPPFLAGS conftest.C >&5 || CXX=
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rm -f conftest.C conftest.o conftest.obj || true
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])
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dnl Usage: LYX_PROG_CLANG: set lyx_cv_prog_clang to yes if the compiler is clang.
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AC_DEFUN([LYX_PROG_CLANG],
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[AC_CACHE_CHECK([whether the compiler is clang],
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@ -180,15 +160,7 @@ AC_DEFUN([LYX_LIB_STDCXX],
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AC_DEFUN([LYX_PROG_CXX],
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[AC_MSG_CHECKING([for a good enough C++ compiler])
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LYX_SEARCH_PROG(CXX, $CXX $CCC g++ gcc c++ CC cxx xlC cc++, [LYX_PROG_CXX_WORKS])
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if test -z "$CXX" ; then
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AC_MSG_ERROR([Unable to find a good enough C++ compiler])
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fi
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AC_MSG_RESULT($CXX)
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AC_REQUIRE([AC_PROG_CXX])
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[AC_REQUIRE([AC_PROG_CXX])
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AC_REQUIRE([AC_PROG_CXXCPP])
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AC_LANG_PUSH(C++)
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LYX_PROG_CLANG
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@ -243,12 +215,12 @@ AC_ARG_ENABLE(optimization,
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case $enable_optimization in
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yes)
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if test $lyx_devel_version = yes ; then
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lyx_opt=-O
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lyx_optim=-O
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else
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lyx_opt=-O2
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lyx_optim=-O2
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fi;;
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no) lyx_opt=;;
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*) lyx_opt=${enable_optimization};;
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no) lyx_optim=;;
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*) lyx_optim=${enable_optimization};;
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esac
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AC_ARG_ENABLE(pch,
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@ -279,42 +251,39 @@ if test x$GXX = xyes; then
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dnl Useful for global version info
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gxx_version=`${CXX} -dumpversion`
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CXX_VERSION="($gxx_version)"
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else
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gxx_version=clang
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fi
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if test "$ac_test_CXXFLAGS" = set; then
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CXXFLAGS="$ac_save_CXXFLAGS"
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else
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CFLAGS="$lyx_opt"
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CXXFLAGS="$lyx_opt"
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AM_CXXFLAGS="$lyx_optim"
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if test x$enable_debug = xyes ; then
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CFLAGS="-g $CFLAGS"
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CXXFLAGS="-g $CXXFLAGS"
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AM_CXXFLAGS="-g $AM_CXXFLAGS"
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fi
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if test $build_type = gprof ; then
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CFLAGS="-pg $CFLAGS"
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CXXFLAGS="-pg $CXXFLAGS"
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LDFLAGS="-pg $LDFLAGS"
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AM_CXXFLAGS="-pg $AM_CXXFLAGS"
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AM_LDFLAGS="-pg $AM_LDFLAGS"
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fi
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if test $build_type = profiling ; then
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CFLAGS="$CFLAGS -fno-omit-frame-pointer"
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CXXFLAGS="$CXXFLAGS -fno-omit-frame-pointer"
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AM_CXXFLAGS="$AM_CXXFLAGS -fno-omit-frame-pointer"
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fi
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fi
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if test "$ac_env_CPPFLAGS_set" != set; then
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if test x$USE_QT5 = xyes ; then
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AS_CASE([$host], [*mingw*|*cygwin*], [], [CPPFLAGS="-fPIC $CPPFLAGS"])
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AS_CASE([$host], [*mingw*|*cygwin*], [], [AM_CXXFLAGS="-fPIC $AM_CXXFLAGS"])
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fi
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dnl Warnings are for preprocessor too
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if test x$enable_warnings = xyes ; then
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case $gxx_version in
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3.1*|3.2*|3.3*)
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CPPFLAGS="-W -Wall $CPPFLAGS"
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AM_CPPFLAGS="-W -Wall $AM_CPPFLAGS"
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;;
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3.4*|4.[0-8]*|clang)
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AM_CPPFLAGS="-Wextra -Wall $AM_CPPFLAGS"
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;;
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*)
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CPPFLAGS="-Wextra -Wall $CPPFLAGS "
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AM_CPPFLAGS="-Wextra -Wall -Wfloat-conversion $AM_CPPFLAGS"
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;;
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esac
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fi
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fi
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case $gxx_version in
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3.1*) AM_CXXFLAGS="-finline-limit=500 ";;
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3.2*|3.3*) AM_CXXFLAGS="";;
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@ -322,13 +291,13 @@ if test x$GXX = xyes; then
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AM_CXXFLAGS=""
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test $enable_pch = yes && lyx_pch_comp=yes
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;;
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*) AM_CXXFLAGS="";;
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esac
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if test x$enable_stdlib_debug = xyes ; then
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dnl FIXME: for clang/libc++, one should define _LIBCPP_DEBUG2=0
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dnl See http://clang-developers.42468.n3.nabble.com/libc-debug-mode-td3336742.html
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case $gxx_version in
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3.4*|4.*)
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3.[123]) ;;
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*)
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lyx_flags="$lyx_flags stdlib-debug"
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AC_DEFINE(_GLIBCXX_DEBUG, 1, [libstdc++ debug mode])
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AC_DEFINE(_GLIBCXX_DEBUG_PEDANTIC, 1, [libstdc++ pedantic debug mode])
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@ -349,23 +318,27 @@ if test x$GXX = xyes; then
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esac
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fi
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if test x$enable_cxx11 = xyes ; then
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dnl FIXME: check what to do with clang (is anything needed at all?)
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case $gxx_version in
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4.3*|4.4*|4.5*|4.6*)
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3.*|4.[012]*) AC_ERROR([There is no C++11 support in gcc 3.x]);;
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4.[3-6]*)
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lyx_flags="$lyx_flags c++11-mode"
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CXXFLAGS="-std=gnu++0x $CXXFLAGS"
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;;
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4.7*|4.8*|4.9*)
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AM_CXXFLAGS="-std=gnu++0x $AM_CXXFLAGS";;
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clang)
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dnl presumably all clang version support c++11.
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lyx_flags="$lyx_flags c++11-mode"
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CXXFLAGS="-std=gnu++11 $CXXFLAGS"
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dnl the deprecated-register warning is very annoying with Qt4.x right now.
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AM_CXXFLAGS="-std=c++11 -Wno-deprecated-register $AM_CXXFLAGS";;
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*)
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lyx_flags="$lyx_flags c++11-mode"
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AM_CXXFLAGS="-std=gnu++11 $AM_CXXFLAGS"
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;;
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esac
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if test x$CLANG = xno || test $lyx_cv_lib_stdcxx = yes; then
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dnl <regex> in gcc is unusable in versions less than 4.9.0
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dnl see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53631
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case $gxx_version in
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4.9*)
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lyx_flags="$lyx_flags stdregex"
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3.*|4.[0-8]*) ;;
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*) lyx_flags="$lyx_flags stdregex"
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lyx_std_regex=yes
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;;
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esac
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12
configure.ac
12
configure.ac
@ -82,13 +82,14 @@ test ! x"$lyx_ldflags" = x && LDFLAGS="$lyx_ldflags $LDFLAGS"
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### Add extra directories to check for include files.
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LYX_WITH_DIR([extra-inc],[extra include directory],extra_inc, NONE)
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LYX_LOOP_DIR($lyx_cv_extra_inc,LYX_ADD_INC_DIR(lyx_cppflags,$dir))
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test ! x"$lyx_cppflags" = x && CPPFLAGS="$lyx_cppflags $CPPFLAGS"
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test ! x"$lyx_cppflags" = x && AM_CPPFLAGS="$lyx_cppflags $AM_CPPFLAGS"
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### Add both includes and libraries
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LYX_WITH_DIR([extra-prefix],[extra lib+include directory],extra_prefix, NONE, ${prefix})
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LYX_LOOP_DIR($lyx_cv_extra_prefix,[
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LYX_ADD_INC_DIR(CPPFLAGS,$dir/include)
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LYX_ADD_LIB_DIR(LDFLAGS,$dir/lib)])
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LYX_ADD_INC_DIR(AM_CPPFLAGS,$dir/include)
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LYX_ADD_LIB_DIR(LDFLAGS,$dir/lib)
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])
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### These are needed in windows
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AC_CHECK_LIB(shlwapi, main, [LIBSHLWAPI=-lshlwapi])
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@ -221,8 +222,8 @@ VERSION_INFO="Configuration\n\
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Host type: ${host}\n\
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Special build flags: ${lyx_flags}\n\
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C++ Compiler: ${CXX} ${CXX_VERSION}\n\
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C++ Compiler LyX flags: ${AM_CPPFLAGS} ${AM_CXXFLAGS}\n\
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C++ Compiler flags: ${CPPFLAGS} ${CXXFLAGS}\n\
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C++ Compiler flags: ${AM_CPPFLAGS} ${AM_CXXFLAGS}\n\
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C++ Compiler user flags: ${CPPFLAGS} ${CXXFLAGS}\n\
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Linker flags: ${AM_LDFLAGS}\n\
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Linker user flags: ${LDFLAGS}\n\
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${FRONTEND_INFO}\
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@ -233,7 +234,6 @@ ${FRONTEND_INFO}\
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AC_SUBST(VERSION_INFO)
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AC_SUBST(AM_CPPFLAGS)
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AC_SUBST(AM_CXXFLAGS)
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AC_SUBST(AM_CFLAGS)
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AC_SUBST(AM_LDFLAGS)
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AC_SUBST(real_pkgdatadir)
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