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Commit6869b4f

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Add C++ support to configure.
This is an optional dependency. It'll be used for the upcoming LLVMbased just in time compilation support, which needs to wrap a few LLVMC++ APIs so they're accessible from C..For now test for C++ compilers unconditionally, without failing if notpresent, to ensure wide buildfarm coverage. If we're bothered by theadditional test times (which are quite short) or verbosity, we canlater make the tests conditional on --with-llvm.Author: Andres FreundDiscussion:https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de
1 parenta364dfa commit6869b4f

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‎config/c-compiler.m4

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@@ -477,6 +477,46 @@ AC_DEFUN([PGAC_PROG_CC_VAR_OPT],
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# PGAC_PROG_VARCXX_VARFLAGS_OPT
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# -----------------------
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# Given a compiler, variable name and a string, check if the compiler
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# supports the string as a command-line option. If it does, add the
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# string to the given variable.
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AC_DEFUN([PGAC_PROG_VARCXX_VARFLAGS_OPT],
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[define([Ac_cachevar],[AS_TR_SH([pgac_cv_prog_$1_cxxflags_$3])])dnl
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AC_CACHE_CHECK([whether ${$1} supports$3, for$2],[Ac_cachevar],
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[pgac_save_CXXFLAGS=$CXXFLAGS
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pgac_save_CXX=$CXX
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CXX=${$1}
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CXXFLAGS="${$2}$3"
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ac_save_cxx_werror_flag=$ac_cxx_werror_flag
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ac_cxx_werror_flag=yes
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AC_LANG_PUSH(C++)
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_AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
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[Ac_cachevar=yes],
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[Ac_cachevar=no])
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AC_LANG_POP([])
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ac_cxx_werror_flag=$ac_save_cxx_werror_flag
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CXXFLAGS="$pgac_save_CXXFLAGS"
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CXX="$pgac_save_CXX"])
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if test x"$Ac_cachevar" = x"yes"; then
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$2="${$2}$3"
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fi
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undefine([Ac_cachevar])dnl
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])# PGAC_PROG_VARCXX_VARFLAGS_OPT
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# PGAC_PROG_CXX_CFLAGS_OPT
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# -----------------------
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# Given a string, check if the compiler supports the string as a
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# command-line option. If it does, add the string to CXXFLAGS.
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AC_DEFUN([PGAC_PROG_CXX_CFLAGS_OPT],
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[PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS,$1)
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])# PGAC_PROG_CXX_VAR_OPT
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# PGAC_PROG_CC_LDFLAGS_OPT
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# ------------------------
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# Given a string, check if the compiler supports the string as a

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