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Implement a pseudo-toolset for cross-compiling (#196)

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When running build.sh with the cross-cc toolset, it uses the native
compiler settings found in the BUILD_CC, BUILD_CFLAGS, and
BUILD_LDFLAGS environment variables to create executables to run on
the build system.  It then sets the toolset to cc so that the
cross-compilers given as CC etc. are propagated to subprocesses.
This ensures both that the build system can build and execute its
required programs and that final executables are cross-compiled for
the target architecture.
This commit is contained in:
David Michael
2019-02-23 10:36:23 -05:00
committed by Rene Rivera
parent d44023da09
commit 4746def4a2
1 changed files with 15 additions and 0 deletions
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15
src/engine/build.sh
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@@ -40,6 +40,12 @@ error_exit ()
echo "### detected. The 'cc' toolset will use the CC, CFLAGS, and LIBS"
echo "### environment variables, if present."
echo "###"
echo "### Similarly, the cross-cc toolset is available for cross-compiling"
echo "### by using the BUILD_CC, BUILD_CFLAGS, and BUILD_LDFLAGS environment"
echo "### variables to compile binaries that will be executed on the build"
echo "### system. This allows CC etc. to be set for cross-compilers to be"
echo "### propagated to subprocesses."
echo "###"
exit 1
}
@@ -268,6 +274,15 @@ case $BOOST_JAM_TOOLSET in
BOOST_JAM_OPT_YYACC="$BOOST_JAM_OPT_YYACC $CFLAGS $LIBS"
;;
cross-cc)
if test -z "$BUILD_CC" ; then BUILD_CC=cc ; fi
BOOST_JAM_CC=$BUILD_CC
BOOST_JAM_OPT_JAM="$BOOST_JAM_OPT_JAM $BUILD_CFLAGS $BUILD_LDFLAGS"
BOOST_JAM_OPT_MKJAMBASE="$BOOST_JAM_OPT_MKJAMBASE $BUILD_CFLAGS $BUILD_LDFLAGS"
BOOST_JAM_OPT_YYACC="$BOOST_JAM_OPT_YYACC $BUILD_CFLAGS $BUILD_LDFLAGS"
BOOST_JAM_TOOLSET=cc
;;
qcc)
BOOST_JAM_CC=qcc
;;