icecc: Export ICECC_CC and friends via wrapper-script

By exporting ICECC_CC, ICECC_CXX, and ICECC_VERSION in a wrapper-script,
and putting this wrapper-script in the PATH, the Makefiles generated by CMake or
the autotools are able to function correctly outside of bitbake.
This provides a convenient developer workflow in which the
modify-compile-unittest cycle can happen directly in the ${B} directory.

The `rm -f $ICE_PATH/$compiler` line is transitional,
and can go at some later date (October 2020 or later, perhaps).

(From OE-Core rev: 40d74cb1d0ddce930267e49764cacb263b244091)

Signed-off-by: Douglas Royds <douglas.royds@taitradio.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 20 insertions, 12 deletions

diff --git a/meta/classes/icecc.bbclass b/meta/classes/icecc.bbclass
index 4376aa37dc..bc3d6f4cc8 100644
--- a/meta/classes/icecc.bbclass
+++ b/meta/classes/icecc.bbclass
@@ -356,17 +356,6 @@ set_icecc_env() {
         return
     fi
 
-    # Create symlinks to icecc in the recipe-sysroot directory
-    mkdir -p ${ICE_PATH}
-    if [ -n "${KERNEL_CC}" ]; then
-        compilers="${@get_cross_kernel_cc(bb,d)}"
-    else
-        compilers="${HOST_PREFIX}gcc ${HOST_PREFIX}g++"
-    fi
-    for compiler in $compilers; do
-        ln -sf ${ICECC_BIN} ${ICE_PATH}/$compiler
-    done
-
     ICECC_CC="${@icecc_get_and_check_tool(bb, d, "gcc")}"
     ICECC_CXX="${@icecc_get_and_check_tool(bb, d, "g++")}"
     # cannot use icecc_get_and_check_tool here because it assumes as without target_sys prefix
@@ -385,6 +374,26 @@ set_icecc_env() {
         return
     fi
 
+    # Create symlinks to icecc and wrapper-scripts in the recipe-sysroot directory
+    mkdir -p $ICE_PATH/symlinks
+    if [ -n "${KERNEL_CC}" ]; then
+        compilers="${@get_cross_kernel_cc(bb,d)}"
+    else
+        compilers="${HOST_PREFIX}gcc ${HOST_PREFIX}g++"
+    fi
+    for compiler in $compilers; do
+        ln -sf $ICECC_BIN $ICE_PATH/symlinks/$compiler
+        rm -f $ICE_PATH/$compiler
+        cat <<-__EOF__ > $ICE_PATH/$compiler
+                #!/bin/sh -e
+                export ICECC_VERSION=$ICECC_VERSION
+                export ICECC_CC=$ICECC_CC
+                export ICECC_CXX=$ICECC_CXX
+                $ICE_PATH/symlinks/$compiler "\$@"
+                __EOF__
+        chmod 775 $ICE_PATH/$compiler
+    done
+
     ICECC_AS="`${ICECC_CC} -print-prog-name=as`"
     # for target recipes should return something like:
     # /OE/tmp-eglibc/sysroots/x86_64-linux/usr/libexec/arm920tt-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.2/as
@@ -417,7 +426,6 @@ set_icecc_env() {
     export CCACHE_PATH="$PATH"
     export CCACHE_DISABLE="1"
 
-    export ICECC_VERSION ICECC_CC ICECC_CXX
     export PATH="$ICE_PATH:$PATH"
 
     bbnote "Using icecc path: $ICE_PATH"