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package/Makefile.in: add host-cc-option macro

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This macro allows to test if HOSTCC supports a specific option. It is
needed to pass '-no-pie' on recent Debian, Ubuntu and Gentoo hosts.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Arnout Vandecappelle 2017-07-03 10:41:06 +02:00 committed by Thomas Petazzoni
parent 83ce8070b4
commit 91a08ecc99
1 changed files with 21 additions and 0 deletions
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21
package/Makefile.in
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@ -222,6 +222,27 @@ HOST_CFLAGS += $(HOST_CPPFLAGS)
HOST_CXXFLAGS += $(HOST_CFLAGS)
HOST_LDFLAGS += -L$(HOST_DIR)/lib -Wl,-rpath,$(HOST_DIR)/lib
# The macros below are taken from linux 4.11 and adapted slightly.
# Copy more when needed.
# try-run
# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
# Exit code chooses option. "$$TMP" is can be used as temporary file and
# is automatically cleaned up.
try-run = $(shell set -e; \
TMP="$$(tempfile)"; \
if ($(1)) >/dev/null 2>&1; \
then echo "$(2)"; \
else echo "$(3)"; \
fi; \
rm -f "$$TMP")
# host-cc-option
# Usage: HOST_FOO_CFLAGS += $(call host-cc-option,-no-pie,)
host-cc-option = $(call try-run,\
$(HOSTCC) $(HOST_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
# host-intltool should be executed with the system perl, so we save
# the path to the system perl, before a host-perl built by Buildroot
# might get installed into $(HOST_DIR)/bin and therefore appears