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https://bugs.gentoo.org/905774
https://github.com/haampie/libtree/issues/78
https://github.com/haampie/libtree/pull/83
From 061d3ec62707a526a83482e57d202a66f9d776cd Mon Sep 17 00:00:00 2001
From: Ismael Luceno <ismael@iodev.co.uk>
Date: Tue, 23 Aug 2022 19:34:39 +0200
Subject: [PATCH] Test the -m32 and -m64 compiler flags before use
Fixes: https://github.com/haampie/libtree/issues/78
Signed-off-by: Ismael Luceno <ismael@iodev.co.uk>
--- a/tests/05_32_bits/Makefile
+++ b/tests/05_32_bits/Makefile
@@ -3,7 +3,7 @@
LD_LIBRARY_PATH=
-.PHONY: clean
+.PHONY: clean check
all: check
@@ -21,11 +21,21 @@ exe64: lib64/libx.so
exe32: lib32/libx.so
echo 'extern int a(); int _start(){return a();}' | $(CC) -m32 "-Wl,-rpath,$(CURDIR)/lib64" "-Wl,-rpath,$(CURDIR)/lib32" -o $@ -nostdlib -x c - -Llib32 -lx
-check: exe32 exe64
- ../../libtree exe32
- ../../libtree exe64
-
clean:
rm -rf lib32 lib64 exe*
CURDIR ?= $(.CURDIR)
+
+test-flag = 2>/dev/null ${CC} -E /dev/null
+test-end = && echo y || echo n
+support-m32 != ${test-flag} -m32 ${test-end}
+support-m64 != ${test-flag} -m64 ${test-end}
+
+check${support-m32:y=}:: exe32
+ ../../libtree exe32
+
+check${support-m64:y=}:: exe64
+ ../../libtree exe64
+
+check${support-m32:n=} check${support-m64:n=}::
+ @echo WARNING: test skipped at ${CURDIR}
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