[PATCH v2 1/2] Fix python client cross compile

The setup.py setuptools wrapper needs to use a version of python built
specifically for cross compiling to cross compile successfully. Allow
setting that in the environment using the SETUPTOOLS_ENV variable.

Fixes the following build failure:

/usr/bin/ld: skipping incompatible .../lirc-tools-0.10.0/lib/.libs/liblirc_client.so when searching for -llirc_client
/usr/bin/ld: cannot find -llirc_client
collect2: error: ld returned 1 exit status
error: command '/usr/bin/gcc' failed with exit status 1
Makefile:1578: recipe for target 'all-local' failed
---
v2: Add AC_ARG_VAR() for SETUPTOOLS_ENV to improve its visibility
---
 Makefile.am  | 2 ++
 configure.ac | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index c263c71cb35e..afa1f54a8522 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -137,6 +137,7 @@ if HAVE_PYTHON35
 all-local:
 	cd python-pkg; \
 	    CFLAGS="$(PY_PKG_CFLAGS)" LDFLAGS="$(PY_PKG_LDFLAGS)" \
+	    $(SETUPTOOLS_ENV) \
 	    $(PYTHON) setup.py $(if $(VERBOSE),,-q) build
 endif
 
@@ -182,6 +183,7 @@ $(PYTHON_TARBALL): $(abs_builddir)/python-pkg/setup.py
 	cp $(top_builddir)/VERSION $(abs_builddir)/python-pkg
 	cd $(abs_builddir)/python-pkg; \
 	    CFLAGS="$(PY_PKG_CFLAGS)" LDFLAGS="$(PY_PKG_LDFLAGS)" \
+	    $(SETUPTOOLS_ENV) \
 	    $(PYTHON) setup.py -q sdist
 
 $(top_builddir)/python-pkg/VERSION: VERSION
diff --git a/configure.ac b/configure.ac
index dcf9703c3530..2f34d6535e01 100644
--- a/configure.ac
+++ b/configure.ac
@@ -493,6 +493,10 @@ AC_ARG_VAR(HAVE_WORKING_POLL,[
 
 AC_ARG_VAR(SH_PATH, [On cross-compile: Path to shell, typically /bin/sh])
 
+AC_ARG_VAR(SETUPTOOLS_ENV,
+  [For cross-compile: Python setuptools wrapper environment variables]
+)
+
 suffix=$(echo "$VERSION" | sed 's/.*-//')
 AM_CONDITIONAL(DEVEL, [test x$suffix = xdevel])
 
-- 
2.14.1


------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot