From dd24ca1cb76de9973220fed356540f190a05ac83 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Tue, 30 Aug 2011 17:01:14 +0200 Subject: Fix build problems on MacOS 10.7 (Lion) On MacOS 10.7 (Lion) with Xcode 4.1 installed, the default C compiler is llvm-gcc-4.2. That compiler compiles beam_emu.c incorrectly, resulting in an emulator that will not start. The problem can be worked around by turning off all optimizations, but that will significantly degrade the performance of the run-time system. The problem can also be worked around manually like this: CC=gcc-4.2 ./configure To allow a working system to be built "out of the box", have the configure script set up the emulator Makefile so that gcc-4.2 will be used to compile beam_emu.c if the default compiler is llvm-based. All other C files will still be compiled with the default compiler. --- erts/aclocal.m4 | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'erts/aclocal.m4') diff --git a/erts/aclocal.m4 b/erts/aclocal.m4 index b64380e817..9956835dc8 100644 --- a/erts/aclocal.m4 +++ b/erts/aclocal.m4 @@ -125,6 +125,9 @@ AC_DEFUN(LM_FIND_EMU_CC, ac_cv_prog_emu_cc, [ AC_TRY_COMPILE([],[ +#ifdef __llvm__ +#error "llvm is currently unable to compile beam_emu.c" +#endif __label__ lbl1; __label__ lbl2; int x = magic(); @@ -140,7 +143,7 @@ lbl2: ],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no) if test $ac_cv_prog_emu_cc = no; then - for ac_progname in emu_cc.sh gcc; do + for ac_progname in emu_cc.sh gcc-4.2 gcc; do IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" ac_dummy="$PATH" for ac_dir in $ac_dummy; do -- cgit v1.2.3