config/cxxflags.m4
author deba
Tue, 19 Apr 2005 13:33:44 +0000
changeset 1374 bcfa3980b432
parent 1350 fb794edbf04b
permissions -rw-r--r--
Call the default constructor of the ObserverBase.
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dnl LX_C_IFDEF(MACRO-NAME, ACTION-IF-DEF, ACTION-IF-NOT-DEF)
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dnl
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dnl Check for the definition of macro MACRO-NAME using the current
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dnl language's compiler.
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dnl
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dnl Orignally written by Ludovic Courtès <ludo@chbouib.org>
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AC_DEFUN([LX_C_IFDEF],
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  [AC_COMPILE_IFELSE([#ifndef $1
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                      # error "Macro $1 is undefined!"
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                      /* For some compilers (eg. SGI's CC), #error is not
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                         enough...  */
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                      please, do fail
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                      #endif],
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                     [$2], [$3])])
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dnl LX_CXX_COMPILER_VENDOR(VENDOR-NAME, [NICKNAME])
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dnl
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dnl Set VENDOR-NAME to the lower-case name of the compiler vendor or
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dnl `unknown' if the compiler's vendor is unknown. `compaq' means the
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dnl CXX compiler as available on Tru64/OSF1/Digital Unix on Alpha
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dnl machines. If NICKNAME is provided, set it to the compiler's usual
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dnl name (eg. `g++', `cxx', `aCC', etc.).
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dnl
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dnl Based on work of Ludovic Courtès <ludo@chbouib.org>
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AC_DEFUN([LX_CXX_COMPILER_VENDOR],
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  [AC_REQUIRE([AC_PROG_CXX])
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   AC_REQUIRE([AC_PROG_CXXCPP])
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   AC_CACHE_CHECK([the C++ compiler vendor],
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    [lx_cv_cxx_compiler_vendor],
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    [AC_LANG_PUSH([C++])
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     dnl Intel's icpc
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     LX_C_IFDEF([__INTEL_COMPILER],
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       [lx_cv_cxx_compiler_vendor=intel],
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       [dnl GNU C++
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        LX_C_IFDEF([__GNUG__],
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         [lx_cv_cxx_compiler_vendor=gnu],
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         [LX_C_IFDEF([__DECCXX],
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           [lx_cv_cxx_compiler_vendor=compaq],
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           [dnl HP's aCC
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            LX_C_IFDEF([__HP_aCC],
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             [lx_cv_cxx_compiler_vendor=hp],
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             [dnl SGI CC
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              LX_C_IFDEF([__sgi],
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               [lx_cv_cxx_compiler_vendor=sgi],
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               [dnl Note:  We are using the C compiler because VC++ doesn't
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                dnl recognize `.cc'(which is used by `configure') as a C++ file
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                dnl extension and requires `/TP' to be passed.
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                AC_LANG_PUSH([C])
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                LX_C_IFDEF([_MSC_VER],
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                  [lx_cv_cxx_compiler_vendor=microsoft],
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                  [lx_cv_cxx_compiler_vendor=unknown])
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                AC_LANG_POP()])])])])])
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     AC_LANG_POP()])
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   $1="$lx_cv_cxx_compiler_vendor"
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   dnl The compiler nickname
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   ifelse([$2], , [],
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     [case "$lx_cv_cxx_compiler_vendor" in
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        intel)     $2=icpc;;
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        gnu)       $2=g++;;
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        compaq)    $2=cxx;;
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        hp)        $2=aCC;;
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        sgi)       $2=CC;;
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        microsoft) $2=cl;;
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        *)         $2=unknown;;
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      esac])])
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dnl Set some debugging and error reporting related compiler flags.
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dnl uses lx_user_cxxflags
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AC_DEFUN([LX_SET_CXXFLAGS],
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  [AC_ARG_ENABLE([debug],
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AS_HELP_STRING([--enable-debug@<:@=yes|no|full@:>@], [build with debugging support])
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AS_HELP_STRING([--disable-debug], [build without debugging support @<:@default@:>@]),
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     [], [enable_debug=no])
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   LX_CXX_COMPILER_VENDOR([lx_cxx_compiler_vendor])
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   AC_MSG_CHECKING([whether to build with debugging support])
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   if test x"$enable_debug" != x"no"; then
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     AC_DEFINE([DEBUG], [1], [Define for debugging support])
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     lx_gnu_cxxflags="-ansi -pedantic -Wall -Wextra"
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     lx_intel_cxxflags="-g"
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     lx_unknown_cxxflags="-g"
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     if test x"$enable_debug" = x"yes"; then
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       lx_gnu_cxxflags="-g $lx_gnu_cxxflags"
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       AC_MSG_RESULT([yes])
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     else
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       lx_gnu_cxxflags="-g3 --no-inline $lx_gnu_cxxflags"
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       AC_MSG_RESULT([full])
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     fi
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     if test x"$lx_cxx_compiler_vendor" = x"gnu"; then
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       CXXFLAGS="$lx_user_cxxflags $lx_gnu_cxxflags"
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     elif test x"$lx_cxx_compiler_vendor" = x"intel"; then
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       CXXFLAGS="$lx_user_cxxflags $lx_intel_cxxflags"
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     else
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       CXXFLAGS="$lx_user_cxxflags $lx_unknown_cxxflags"
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     fi
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   else
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     AC_MSG_RESULT([no])
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   fi
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   AC_ARG_ENABLE([extra-warnings],
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AS_HELP_STRING([--enable-extra-warnings], [enable extra warning messages])
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AS_HELP_STRING([--disable-extra-warnings], [disable extra warning messages @<:@default@:>@]),
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     [],[enable_extra_warnings=no])
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   AC_MSG_CHECKING(whether to enable extra warning flags)
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   if test x"$enable_extra_warnings" != x"no"; then
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     if test x"$lx_cxx_compiler_vendor" = x"gnu"; then
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       CXXFLAGS="$CXXFLAGS -ansi -pedantic -Wall -Wextra"
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       CXXFLAGS="$CXXFLAGS -Wfloat-equal -Wundef -Wendif-labels -Wshadow"
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       CXXFLAGS="$CXXFLAGS -Wpointer-arith -Wcast-qual -Wcast-align"
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       CXXFLAGS="$CXXFLAGS -Wwrite-strings -Wconversion -Waggregate-return"
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       CXXFLAGS="$CXXFLAGS -Wmissing-noreturn -Wmissing-format-attribute"
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       CXXFLAGS="$CXXFLAGS -Wpacked -Wpadded -Wredundant-decls"
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       CXXFLAGS="$CXXFLAGS -Wunreachable-code -Winline -Winvalid-pch"
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       CXXFLAGS="$CXXFLAGS -Wlong-long -Wdisabled-optimization"
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       CXXFLAGS="$CXXFLAGS -Wstack-protector"
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     elif test x"$lx_cxx_compiler_vendor" = x"intel"; then
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       CXXFLAGS="$CXXFLAGS -w2"
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     fi
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     AC_MSG_RESULT([yes])
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   else
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     AC_MSG_RESULT([no])
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   fi])