Update Apple's build script for llvmCore. <rdar://problem/12914321>

This change is basically just copying changes that we've used for Apple's
clang builds to the script used for building llvmCore. Besides cleaning it
up to use xcrun to locate the proper versions of tools, especially for cross
compiling, it fixes the build to work with newer versions of clang that
honor SDKROOT settings in the environment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172138 91177308-0d34-0410-b5e6-96231b3b80d8

utils/buildit/build_llvm

@@ -77,6 +77,37 @@ rm $SRC_DIR/Makefile || exit 1
 # Now create our own by editing the top-level Makefile, deleting every line marked "Apple-style":
 sed -e '/[Aa]pple-style/d' -e '/include.*GNUmakefile/d' $ORIG_SRC_DIR/Makefile > $SRC_DIR/Makefile || exit 1
 
+SUBVERSION=`echo $RC_ProjectSourceVersion | sed -e 's/.*\.\([0-9]*\).*/\1/'`
+if [ "x$SUBVERSION" != "x$RC_ProjectSourceVersion" ]; then
+    LLVM_SUBMIT_SUBVERSION=`printf "%02d" $SUBVERSION`
+    RC_ProjectSourceVersion=`echo $RC_ProjectSourceVersion | sed -e 's/\..*//'`
+    LLVM_SUBMIT_VERSION=$RC_ProjectSourceVersion
+fi
+if [ "x$LLVM_SUBMIT_SUBVERSION" = "x00" -o "x$LLVM_SUBMIT_SUBVERSION" = "x0" ]; then
+    LLVM_VERSION="$LLVM_SUBMIT_VERSION"
+else
+    LLVM_VERSION="$LLVM_SUBMIT_VERSION-$LLVM_SUBMIT_SUBVERSION"
+fi
+LLVM_VERSION_INFO="'\" Apple Build #$LLVM_VERSION\"'"
+
+# Figure out how many make processes to run.
+SYSCTL=`sysctl -n hw.activecpu`
+# sysctl -n hw.* does not work when invoked via B&I chroot /BuildRoot.
+# Builders can default to 2, since even if they are single processor,
+# nothing else is running on the machine.
+if [ -z "$SYSCTL" ]; then
+    SYSCTL=2
+fi
+JOBS_FLAG="-j $SYSCTL"
+
+COMMON_CONFIGURE_OPTS="\
+  --prefix=$DEST_DIR$DEST_ROOT \
+  --enable-assertions=$LLVM_ASSERTIONS \
+  --enable-optimized=$LLVM_OPTIMIZED \
+  --disable-bindings"
+
+COMMON_MAKEFLAGS=$JOBS_FLAG $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$HOSTS" UNIVERSAL_SDK_PATH=$SDKROOT NO_RUNTIME_LIBS=1 DISABLE_EDIS=1 REQUIRES_RTTI=1 DEBUG_SYMBOLS=1 LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION CXXFLAGS=-DLLVM_VERSION_INFO="$LLVM_VERSION_INFO" VERBOSE=1
+
 # Build the LLVM tree universal.
 mkdir -p $DIR/obj-llvm || exit 1
 cd $DIR/obj-llvm || exit 1
@@ -89,6 +120,7 @@ if [ "$ARM_HOSTED_BUILD" = yes ]; then
   for prog in ar nm ranlib strip lipo ld as ; do
     P=$DIR/bin/arm-apple-darwin$DARWIN_VERS-${prog}
     T=`xcrun -sdk $SDKROOT -find ${prog}`
+    ln -s $T $DIR/bin/$prog
     echo '#!/bin/sh' > $P || exit 1
     echo 'exec '$T' "$@"' >> $P || exit 1
     chmod a+x $P || exit 1
@@ -97,18 +129,33 @@ if [ "$ARM_HOSTED_BUILD" = yes ]; then
   for prog in clang clang++ ; do
     P=$DIR/bin/arm-apple-darwin$DARWIN_VERS-${prog}
     T=`xcrun -sdk $SDKROOT -find ${prog}`
+    ln -s $T $DIR/bin/$prog
     echo '#!/bin/sh' > $P || exit 1
     echo 'exec '$T' -arch armv7 -isysroot '${SDKROOT}' "$@"' >> $P || exit 1
     chmod a+x $P || exit 1
   done
 
   PATH=$DIR/bin:$PATH
+
+  unset SDKROOT && \
+  $SRC_DIR/configure $COMMON_CONFIGURE_OPTS \
+    --enable-targets=arm \
+    --host=arm-apple-darwin10 \
+    --target=arm-apple-darwin10 \
+    --build=i686-apple-darwin10 \
+    --program-prefix="" \
+    || exit 1
+
+  make $COMMON_MAKEFLAGS SDKROOT=
+  if [ $? != 0 ] ; then
+    echo "error: LLVM 'make' failed!"
+    exit 1
   fi 
 
-if [ "$ARM_HOSTED_BUILD" = yes ]; then
+else
-  configure_opts="--enable-targets=arm --host=arm-apple-darwin10 \
+# not $ARM_HOSTED_BUILD
-                  --target=arm-apple-darwin10 --build=i686-apple-darwin10"
+
-elif [ "$IOS_SIM_BUILD" = yes ]; then
+  if [ "$IOS_SIM_BUILD" = yes ]; then
     # Use a non-standard "darwin_sim" host triple to trigger a cross-build.
     configure_opts="--enable-targets=x86 --host=i686-apple-darwin_sim \
                     --build=i686-apple-darwin10"
@@ -116,62 +163,23 @@ else
     configure_opts="--enable-targets=arm,x86"
   fi
 
-if [ "$ARM_HOSTED_BUILD" != yes ]; then
   if [ $SDKROOT ]; then
     CPPFLAGS="$CPPFLAGS -isysroot $SDKROOT"
   fi
   for host in $HOSTS; do :; done
   CPPFLAGS="$CPPFLAGS -arch $host"
-fi
 
-if [ \! -f Makefile.config ]; then
+  $SRC_DIR/configure $COMMON_CONFIGURE_OPTS $configure_opts \
-  $SRC_DIR/configure --prefix=$DEST_DIR$DEST_ROOT $configure_opts \
+    --program-prefix="" \
-    --enable-assertions=$LLVM_ASSERTIONS \
-    --enable-optimized=$LLVM_OPTIMIZED \
-    --disable-bindings \
     CPPFLAGS="$CPPFLAGS" \
     || exit 1
-fi
-
-SUBVERSION=`echo $RC_ProjectSourceVersion | sed -e 's/.*\.\([0-9]*\).*/\1/'`
-
-if [ "x$SUBVERSION" != "x$RC_ProjectSourceVersion" ]; then
-    LLVM_SUBMIT_SUBVERSION=`printf "%02d" $SUBVERSION`
-    RC_ProjectSourceVersion=`echo $RC_ProjectSourceVersion | sed -e 's/\..*//'`
-    LLVM_SUBMIT_VERSION=$RC_ProjectSourceVersion
-fi
-
-if [ "x$LLVM_SUBMIT_SUBVERSION" = "x00" -o "x$LLVM_SUBMIT_SUBVERSION" = "x0" ]; then
-    LLVM_VERSION="$LLVM_SUBMIT_VERSION"
-else
-    LLVM_VERSION="$LLVM_SUBMIT_VERSION-$LLVM_SUBMIT_SUBVERSION"
-fi
-
-# Figure out how many make processes to run.
-SYSCTL=`sysctl -n hw.activecpu`
-# sysctl -n hw.* does not work when invoked via B&I chroot /BuildRoot.
-# Builders can default to 2, since even if they are single processor,
-# nothing else is running on the machine.
-if [ -z "$SYSCTL" ]; then
-    SYSCTL=2
-fi
-JOBS_FLAG="-j $SYSCTL"
-
-make $JOBS_FLAG $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$HOSTS" \
-    UNIVERSAL_SDK_PATH=$SDKROOT \
-    NO_RUNTIME_LIBS=1 \
-    DISABLE_EDIS=1 \
-    REQUIRES_RTTI=1 \
-    DEBUG_SYMBOLS=1 \
-    LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
-    LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
-    CXXFLAGS="-DLLVM_VERSION_INFO='\" Apple Build #$LLVM_VERSION\"'" \
-    VERBOSE=1
 
+  make $COMMON_MAKEFLAGS
   if [ $? != 0 ] ; then
     echo "error: LLVM 'make' failed!"
     exit 1
   fi 
+fi 
 
 ################################################################################
 # Construct the actual destination root, by copying stuff from $DIR/dst-* to
@@ -185,14 +193,7 @@ rm -rf * || exit 1
 cd $DIR/obj-llvm || exit 1
 
 # Install the tree into the destination directory.
-make $LOCAL_MAKEFLAGS $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$HOSTS" \
+make $COMMON_MAKEFLAGS install
-    NO_RUNTIME_LIBS=1 \
-    DISABLE_EDIS=1 \
-    DEBUG_SYMBOLS=1 \
-    LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
-    LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
-    OPTIMIZE_OPTION='-O3' VERBOSE=1 install
-
 if ! test $? == 0 ; then
     echo "error: LLVM 'make install' failed!"
     exit 1
@@ -263,9 +264,10 @@ cd $SYM_DIR || exit 1
 rm -rf * || exit 1
 
 # Generate .dSYM files
+DSYMUTIL=`xcrun -find dsymutil`
 find $DEST_DIR -perm -0111 -type f \
     ! \( -name '*.la' -o -name gccas -o -name gccld -o -name llvm-config -o -name '*.a' \) \
-    -print | xargs -n 1 -P ${SYSCTL} dsymutil
+    -print | xargs -n 1 -P ${SYSCTL} ${DSYMUTIL}
 
 # Save .dSYM files and .a archives
 cd $DEST_DIR || exit 1