svn merge ^/branches/released . --username marha

1 files changed, 119 insertions, 0 deletions

diff --git a/mesalib/acinclude.m4 b/mesalib/acinclude.m4
new file mode 100644
index 000000000..a5b389d5d
--- /dev/null
+++ b/mesalib/acinclude.m4
@@ -0,0 +1,119 @@
+# A few convenience macros for Mesa, mostly to keep all the platform
+# specifics out of configure.ac.
+
+# 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