#9720: libffi compilation does not use bundled g++ on Windows -------------------------------------+------------------------------------- Reporter: gintas | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.8.3 Keywords: | Operating System: Windows Architecture: Unknown/Multiple | Type of failure: Difficulty: Unknown | None/Unknown Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Building GHC fails on Windows (at least on mingw32) if there is no host g++ compiler available. The cause seems to be that configure script looks for a C++ compiler and fails to find one. Here's the invocation of the libffi configure script from the main build: cd libffi && \ \ cd build && \ CC=C:/Users/Gintas/Downloads/msys32/home/Gintas/ghc/inplace/mingw/bin/gcc.exe \ LD=C:/Users/Gintas/Downloads/msys32/home/Gintas/ghc/inplace/mingw/bin/ld.exe \ AR=/usr/bin/ar \ NM=C:/Users/Gintas/Downloads/msys32/home/Gintas/ghc/inplace/mingw/bin/nm.exe \ RANLIB=C:/Users/Gintas/Downloads/msys32/home/Gintas/ghc/inplace/mingw/bin/ranlib.exe \ CFLAGS=" -U__i686 -march=i686 -fno-stack-protector -w" \ LDFLAGS=" -w" \ "/bin/sh" ./configure \ --prefix=C:/Users/Gintas/Downloads/msys32/home/Gintas/ghc/libffi/build/inst \ --libdir=C:/Users/Gintas/Downloads/msys32/home/Gintas/ghc/libffi/build/inst/lib \ --enable-static=yes \ --enable-shared=no \ --host=i386-unknown-mingw32 Note that CC is overridden, but CXX is not. The configure script then looks for a C++ compiler and finds KCC, which is not even a compiler but a kerberos tool: checking for g++... no checking for c++... no checking for gpp... no checking for aCC... no checking for CC... no checking for cxx... no checking for cc++... no checking for cl.exe... no checking for FCC... no checking for KCC... KCC checking whether we are using the GNU C++ compiler... no checking whether KCC accepts -g... no checking dependency style of KCC... none This causes the configure script to fail later on. g++ is not actually used in the build (looks like it's only needed for one test case), passing in gcc for CXX seems to work fine. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9720 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler