From f8c58ff816334413942c624928c5ac1753db4133 Mon Sep 17 00:00:00 2001 From: "csilvers+ctemplate@google.com" Date: Sat, 10 Sep 2011 11:33:35 +0000 Subject: [PATCH] A user reported a bug that configure should die when g++ isn't installed, but wasn't: http://code.google.com/p/google-perftools/issues/detail?id=217 This turned out to be a bug in autoconf: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=357378 The workaround is simple: check for CXX before checking for CC. This means that if g++ is installed but gcc isn't, we won't die (at cc-checking time), but I tested, and the configure script dies later. In any case, it seems unlikely someone would have a c++ compiler installed but not a c compiler. This fixes the 4 opensource projects I work on that are susceptible to this. R=iant DELTA=1437 (694 added, 694 deleted, 49 changed) Revision created by MOE tool push_codebase. MOE_MIGRATION=3221 --- configure | 1626 +++++++++++++++++++++++++------------------------- configure.ac | 2 +- 2 files changed, 814 insertions(+), 814 deletions(-) diff --git a/configure b/configure index a1433ef..a7bbc4d 100755 --- a/configure +++ b/configure @@ -854,11 +854,11 @@ am__leading_dot AMTAR am__tar am__untar -CC -CFLAGS +CXX +CXXFLAGS LDFLAGS CPPFLAGS -ac_ct_CC +ac_ct_CXX EXEEXT OBJEXT DEPDIR @@ -867,16 +867,16 @@ am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH +CXXDEPMODE +am__fastdepCXX_TRUE +am__fastdepCXX_FALSE +CC +CFLAGS +ac_ct_CC CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE CPP -CXX -CXXFLAGS -ac_ct_CXX -CXXDEPMODE -am__fastdepCXX_TRUE -am__fastdepCXX_FALSE GCC_TRUE GCC_FALSE MINGW_TRUE @@ -939,15 +939,15 @@ enable_namespace ac_precious_vars='build_alias host_alias target_alias -CC -CFLAGS +CXX +CXXFLAGS LDFLAGS LIBS CPPFLAGS -CPP -CXX -CXXFLAGS CCC +CC +CFLAGS +CPP CXXCPP' @@ -1599,16 +1599,16 @@ Optional Packages: --with-gnu-ld assume the C compiler uses GNU ld [default=no] Some influential environment variables: - CC C compiler command - CFLAGS C compiler flags + CXX C++ compiler command + CXXFLAGS C++ compiler flags LDFLAGS linker flags, e.g. -L if you have libraries in a nonstandard directory LIBS libraries to pass to the linker, e.g. -l CPPFLAGS C/C++/Objective C preprocessor flags, e.g. -I if you have headers in a nonstandard directory + CC C compiler command + CFLAGS C compiler flags CPP C preprocessor - CXX C++ compiler command - CXXFLAGS C++ compiler flags CXXCPP C++ preprocessor Use these variables to override the choices made by `configure' or to help @@ -2646,6 +2646,794 @@ ac_config_headers="$ac_config_headers src/config.h" # Checks for programs. +ac_ext=cpp +ac_cpp='$CXXCPP $CPPFLAGS' +ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_cxx_compiler_gnu +if test -z "$CXX"; then + if test -n "$CCC"; then + CXX=$CCC + else + if test -n "$ac_tool_prefix"; then + for ac_prog in g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC + do + # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. +set dummy $ac_tool_prefix$ac_prog; ac_word=$2 +{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if test "${ac_cv_prog_CXX+set}" = set; then + $as_echo_n "(cached) " >&6 +else + if test -n "$CXX"; then + ac_cv_prog_CXX="$CXX" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then + ac_cv_prog_CXX="$ac_tool_prefix$ac_prog" + $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done +IFS=$as_save_IFS + +fi +fi +CXX=$ac_cv_prog_CXX +if test -n "$CXX"; then + { $as_echo "$as_me:$LINENO: result: $CXX" >&5 +$as_echo "$CXX" >&6; } +else + { $as_echo "$as_me:$LINENO: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$CXX" && break + done +fi +if test -z "$CXX"; then + ac_ct_CXX=$CXX + for ac_prog in g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... 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