[OE-core] [PATCH 1/3] distutils-common-base.bbclass: Define commonly used compiler variables

[Khem Raj]

This is inspired from
https://github.com/python/cpython/blob/master/configure.ac

Helps cross compiling python C modules in some cases where they do
not respect normal CFLAGS

Errors like using gcc to link when compiler is clang is fixed

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 meta/classes/distutils-common-base.bbclass | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/meta/classes/distutils-common-base.bbclass b/meta/classes/distutils-common-base.bbclass
index 824a1b68b1..94b5fd426d 100644
--- a/meta/classes/distutils-common-base.bbclass
+++ b/meta/classes/distutils-common-base.bbclass
@@ -1,6 +1,18 @@
 export STAGING_INCDIR
 export STAGING_LIBDIR
 
+# LDSHARED is the ld *command* used to create shared library
+export LDSHARED  = "${CCLD} -shared"
+# LDXXSHARED is the ld *command* used to create shared library of C++
+# objects
+export LDCXXSHARED  = "${CXX} -shared"
+# CCSHARED are the C *flags* used to create objects to go into a shared
+# library (module)
+export CCSHARED  = "-fPIC -DPIC"
+# LINKFORSHARED are the flags passed to the $(CC) command that links
+# the python executable
+export LINKFORSHARED = "{SECURITY_CFLAGS} -Xlinker -export-dynamic"
+
 FILES_${PN} += "${libdir}/* ${libdir}/${PYTHON_DIR}/*"
 
 FILES_${PN}-staticdev += "\
-- 
2.18.0