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Use $(pie-default) with conformtest [committed]

Message ID alpine.DEB.2.22.394.2109171924280.3823047@digraph.polyomino.org.uk
State Committed
Commit 885762aa31d75de8b9fea4c0e2e372b582d4c548
Headers show
Series Use $(pie-default) with conformtest [committed] | expand

Commit Message

Joseph Myers Sept. 17, 2021, 7:24 p.m. UTC
My glibc bot showed that my conformtest changes fail the build of the
conformtest execution tests for x86_64-linux-gnu-static-pie, because
linking the newly built object with the newly built libc and the
associated options normally used for linking requires it to be built
as PIE.  Add $(pie-default) to the compiler command used so that PIE
options are used when required.

There's a case for using the whole of $(CFLAGS-.o) (which includes
$(pie-default)), but that raises questions of any impact from using
optimization flags from CFLAGS in these tests.  So for now just use
$(pie-default) as the key part of $(CFLAGS-.o) that's definitely

Tested with build-many-glibcs.py for x86_64-linux-gnu-static-pie.


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diff --git a/conform/Makefile b/conform/Makefile
index 296db818f0..27ad98caf8 100644
--- a/conform/Makefile
+++ b/conform/Makefile
@@ -175,7 +175,8 @@  $(conformtest-header-tests): $(objpfx)%/conform.out: \
 			     conformtest.py $(conformtest-headers-data)
 	(set -e; std_hdr=$*; std=$${std_hdr%%/*}; hdr=$${std_hdr#*/}; \
 	 mkdir -p $(@D); \
-	 $(PYTHON) $< --cc='$(CC)' --flags='$(conformtest-cc-flags)' \
+	 $(PYTHON) $< --cc='$(CC) $(pie-default)' \
+		   --flags='$(conformtest-cc-flags)' \
 		   --ldflags='$(+link-tests-before-inputs)' \
 		   --libs='$(+link-tests-after-inputs)' \
 		   --run-program-prefix='$(run-program-prefix)' \