[llvm-commits] [llvm-gcc-4.2] r83029 - /llvm-gcc-4.2/trunk/build_gcc

[Stuart Hastings]

Author: stuart
Date: Mon Sep 28 18:45:35 2009
New Revision: 83029

URL: http://llvm.org/viewvc/llvm-project?rev=83029&view=rev
Log:
For Apple-style (B&I) builds, prefer LLVM-GCC if available, fall back
to GCC if not.  Respect CC and CXX if set in the environment.
Temporarily adds /Developer/usr/bin to the PATH for checking.

Modified:
    llvm-gcc-4.2/trunk/build_gcc

Modified: llvm-gcc-4.2/trunk/build_gcc
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/build_gcc?rev=83029&r1=83028&r2=83029&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/build_gcc (original)
+++ llvm-gcc-4.2/trunk/build_gcc Mon Sep 28 18:45:35 2009
@@ -263,6 +263,17 @@
 fi
 # LLVM LOCAL end
 
+# If the user has set CC or CXX, respect their wishes.  If not,
+# compile with LLVM-GCC/LLVM-G++ if available; if LLVM is not
+# available, fall back to usual GCC/G++ default.
+savedPATH=$PATH ; PATH="$PATH:/Developer/usr/bin"
+XTMPCC=$(which llvm-gcc)
+if [ x$CC  = x -a x$XTMPCC != x ] ; then export CC=$XTMPCC  forcedCC=1  ; fi
+XTMPCC=$(which llvm-g++)
+if [ x$CXX = x -a x$XTMPCC != x ] ; then export CXX=$XTMPCC forcedCXX=1 ; fi
+PATH=$savedPATH
+unset XTMPCC savedPATH
+
 # Build the native GCC.  Do this even if the user didn't ask for it
 # because it'll be needed for the bootstrap.
 mkdir -p $DIR/obj-$BUILD-$BUILD $DIR/dst-$BUILD-$BUILD || exit 1
@@ -272,6 +283,7 @@
    --host=$BUILD-apple-darwin$DARWIN_VERS \
    --target=$BUILD-apple-darwin$DARWIN_VERS || exit 1
 fi
+
 # Unset RC_DEBUG_OPTIONS because it causes the bootstrap to fail.
 # Also keep unset for cross compilers so that the cross built libraries are
 # comparable to the native built libraries.
@@ -281,6 +293,11 @@
 make $MAKEFLAGS DESTDIR=$DIR/dst-$BUILD-$BUILD install-gcc install-target \
   CFLAGS="$CFLAGS" CXXFLAGS="$CFLAGS" || exit 1
 
+# Now that we've built a native compiler, un-kludge these so that
+# subsequent cross-hosted compilers can be found normally.
+if [ x$forcedCC  != x ] ; then unset CC  forcedCC  ; fi
+if [ x$forcedCXX != x ] ; then unset CXX forcedCXX ; fi
+
 # Add the compiler we just built to the path, giving it appropriate names.
 # LLVM LOCAL begin Support for non /usr $DEST_ROOT
 D=$DIR/dst-$BUILD-$BUILD$DEST_ROOT/bin