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Dan Peori
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# A few convenience macros for Mesa, mostly to keep all the platform | ||
# specifics out of configure.ac. | ||
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# MESA_PIC_FLAGS() | ||
# | ||
# Find out whether to build PIC code using the option --enable-pic and | ||
# the configure enable_static/enable_shared settings. If PIC is needed, | ||
# figure out the necessary flags for the platform and compiler. | ||
# | ||
# The platform checks have been shamelessly taken from libtool and | ||
# stripped down to just what's needed for Mesa. See _LT_COMPILER_PIC in | ||
# /usr/share/aclocal/libtool.m4 or | ||
# http://git.savannah.gnu.org/gitweb/?p=libtool.git;a=blob;f=libltdl/m4/libtool.m4;hb=HEAD | ||
# | ||
AC_DEFUN([MESA_PIC_FLAGS], | ||
[AC_REQUIRE([AC_PROG_CC])dnl | ||
AC_ARG_VAR([PIC_FLAGS], [compiler flags for PIC code]) | ||
AC_ARG_ENABLE([pic], | ||
[AS_HELP_STRING([--disable-pic], | ||
[compile PIC objects @<:@default=enabled for shared builds | ||
on supported platforms@:>@])], | ||
[enable_pic="$enableval" | ||
test "x$enable_pic" = x && enable_pic=auto], | ||
[enable_pic=auto]) | ||
# disable PIC by default for static builds | ||
if test "$enable_pic" = auto && test "$enable_static" = yes; then | ||
enable_pic=no | ||
fi | ||
# if PIC hasn't been explicitly disabled, try to figure out the flags | ||
if test "$enable_pic" != no; then | ||
AC_MSG_CHECKING([for $CC option to produce PIC]) | ||
# allow the user's flags to override | ||
if test "x$PIC_FLAGS" = x; then | ||
# see if we're using GCC | ||
if test "x$GCC" = xyes; then | ||
case "$host_os" in | ||
aix*|beos*|cygwin*|irix5*|irix6*|osf3*|osf4*|osf5*) | ||
# PIC is the default for these OSes. | ||
;; | ||
mingw*|os2*|pw32*) | ||
# This hack is so that the source file can tell whether | ||
# it is being built for inclusion in a dll (and should | ||
# export symbols for example). | ||
PIC_FLAGS="-DDLL_EXPORT" | ||
;; | ||
darwin*|rhapsody*) | ||
# PIC is the default on this platform | ||
# Common symbols not allowed in MH_DYLIB files | ||
PIC_FLAGS="-fno-common" | ||
;; | ||
hpux*) | ||
# PIC is the default for IA64 HP-UX and 64-bit HP-UX, | ||
# but not for PA HP-UX. | ||
case $host_cpu in | ||
hppa*64*|ia64*) | ||
;; | ||
*) | ||
PIC_FLAGS="-fPIC" | ||
;; | ||
esac | ||
;; | ||
*) | ||
# Everyone else on GCC uses -fPIC | ||
PIC_FLAGS="-fPIC" | ||
;; | ||
esac | ||
else # !GCC | ||
case "$host_os" in | ||
hpux9*|hpux10*|hpux11*) | ||
# PIC is the default for IA64 HP-UX and 64-bit HP-UX, | ||
# but not for PA HP-UX. | ||
case "$host_cpu" in | ||
hppa*64*|ia64*) | ||
# +Z the default | ||
;; | ||
*) | ||
PIC_FLAGS="+Z" | ||
;; | ||
esac | ||
;; | ||
linux*|k*bsd*-gnu) | ||
case `basename "$CC"` in | ||
icc*|ecc*|ifort*) | ||
PIC_FLAGS="-KPIC" | ||
;; | ||
pgcc*|pgf77*|pgf90*|pgf95*) | ||
# Portland Group compilers (*not* the Pentium gcc | ||
# compiler, which looks to be a dead project) | ||
PIC_FLAGS="-fpic" | ||
;; | ||
ccc*) | ||
# All Alpha code is PIC. | ||
;; | ||
xl*) | ||
# IBM XL C 8.0/Fortran 10.1 on PPC | ||
PIC_FLAGS="-qpic" | ||
;; | ||
*) | ||
case `$CC -V 2>&1 | sed 5q` in | ||
*Sun\ C*|*Sun\ F*) | ||
# Sun C 5.9 or Sun Fortran | ||
PIC_FLAGS="-KPIC" | ||
;; | ||
esac | ||
esac | ||
;; | ||
solaris*) | ||
PIC_FLAGS="-KPIC" | ||
;; | ||
sunos4*) | ||
PIC_FLAGS="-PIC" | ||
;; | ||
esac | ||
fi # GCC | ||
fi # PIC_FLAGS | ||
AC_MSG_RESULT([$PIC_FLAGS]) | ||
fi | ||
AC_SUBST([PIC_FLAGS]) | ||
])# MESA_PIC_FLAGS |
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# gives unlimited permission to copy and/or distribute it, | ||
# with or without modifications, as long as this notice is preserved. | ||
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# This program is distributed in the hope that it will be useful, | ||
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without | ||
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# the Free Software Foundation; either version 2 of the License, or | ||
# (at your option) any later version. | ||
# | ||
# This program is distributed in the hope that it will be useful, but | ||
# WITHOUT ANY WARRANTY; without even the implied warranty of | ||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
# General Public License for more details. | ||
# | ||
# You should have received a copy of the GNU General Public License | ||
# along with this program; if not, write to the Free Software | ||
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
# | ||
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