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| author | Dan Nicholson <dbn.lists@gmail.com> | 2007-12-26 11:12:29 -0600 |
|---|---|---|
| committer | Dan Nicholson <dbn.lists@gmail.com> | 2007-12-26 15:38:30 -0600 |
| commit | ab57cbaccccb30fd743ba3283251430e6bc3a071 (patch) | |
| tree | 02898c2b71f76ef6e162c80f9c2f7381221d156a | |
| parent | 4c5a2b3af214e7a0ec0742b17beb1e719552ecae (diff) | |
autoconf: Helper options for adding GCC 32/64 bit flags
Two new configure options to add -m32 or -m64 to the CFLAGS and CXXFLAGS
when GCC is in use. By default, the user supplied options are
environment variables are respected, but these options are quick helps
for the common case of x86/x86_64 using GCC.
| -rw-r--r-- | configure.ac | 32 | ||||
| -rw-r--r-- | docs/autoconf.html | 7 |
2 files changed, 39 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index f2f2d75a1..2acbd67e5 100644 --- a/configure.ac +++ b/configure.ac @@ -80,6 +80,38 @@ AC_SUBST(OPT_FLAGS) AC_SUBST(ARCH_FLAGS) dnl +dnl Hacks to enable 32 or 64 bit build +dnl +AC_ARG_ENABLE(32-bit, + [AS_HELP_STRING([--enable-32-bit], + [build 32-bit libraries @<:@default=auto@:>@])], + enable_32bit="$enableval", + enable_32bit=auto +) +if test "x$enable_32bit" = xyes; then + if test "x$GCC" = xyes; then + CFLAGS="$CFLAGS -m32" + fi + if test "x$GXX" = xyes; then + CXXFLAGS="$CXXFLAGS -m32" + fi +fi +AC_ARG_ENABLE(64-bit, + [AS_HELP_STRING([--enable-64-bit], + [build 64-bit libraries @<:@default=auto@:>@])], + enable_64bit="$enableval", + enable_64bit=auto +) +if test "x$enable_64bit" = xyes; then + if test "x$GCC" = xyes; then + CFLAGS="$CFLAGS -m64" + fi + if test "x$GXX" = xyes; then + CXXFLAGS="$CXXFLAGS -m64" + fi +fi + +dnl dnl shared/static libraries, mimic libtool options dnl AC_ARG_ENABLE(static, diff --git a/docs/autoconf.html b/docs/autoconf.html index ab1e21db0..964ff140a 100644 --- a/docs/autoconf.html +++ b/docs/autoconf.html @@ -124,6 +124,13 @@ available for a few architectures. These will be used by default if one of these architectures is detected. This option ensures that assembly will not be used. </li> +<li><code>--enable-32-bit, --enable-64-bit</code> - By default, the +build will compile code as directed by the environment variables +<code>CC</code>, <code>CFLAGS</code>, etc. If the compiler is +<code>gcc</code>, these options offer a helper to add the compiler flags +to force 32- or 64-bit code generation as used on the x86 and x86_64 +architectures. +</li> </ul> </p> |