[PR target/65181] nvptx libgcc: Prevent building "advanced" stuff (for example, gcov support)

[PR target/65181] nvptx libgcc: Prevent building "advanced" stuff (for example, gcov support)

[Thomas Schwinge]

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Hi!

Committed to trunk in r220915:

commit 0853f8db62498ecc36380aa2b352f812c37aae2f
Author: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Feb 23 17:51:41 2015 +0000

    [PR target/65181] nvptx libgcc: Prevent building "advanced" stuff (for example, gcov support)
    
    When building GCC against a proper newlib sysroot, the libgcc build will
    include more than what's built in the -Dinhibit_libc configuration used when
    building newlib as part of the GCC build process.  See the inhibit_libc logic
    in gcc/configure.ac.
    
    To avoid...
    
        ptxas _gcov_indirect_call_topn_profiler.o, line 101; error   : Type or alignment of argument does not match formal parameter 'ptr'
        ptxas _gcov_indirect_call_topn_profiler.o, line 101; error   : Call has wrong number of parameters
        ptxas _gcov_indirect_call_topn_profiler.o, line 101; error   : Type or alignment of argument does not match formal parameter 'size'
        ptxas fatal   : Ptx assembly aborted due to errors
        nvptx-as: ptxas returned 255 exit status
        make[2]: *** [_gcov_indirect_call_topn_profiler.o] Error 1
    
    ..., "dumb down" the libgcc build:
    
    	libgcc/
    	PR target/65181
    	* config/nvptx/t-nvptx (INHIBIT_LIBC_CFLAGS): Define to
    	-Dinhibit_libc.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@220915 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libgcc/ChangeLog            |    6 ++++++
 libgcc/config/nvptx/t-nvptx |    5 +++++
 2 files changed, 11 insertions(+)

diff --git libgcc/ChangeLog libgcc/ChangeLog
index e05ba78..df36a8d 100644
--- libgcc/ChangeLog
+++ libgcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-02-23  Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR target/65181
+	* config/nvptx/t-nvptx (INHIBIT_LIBC_CFLAGS): Define to
+	-Dinhibit_libc.
+
 2015-02-17  Sandra Loosemore  <sandra@codesourcery.com>
 
 	* config/arm/bpabi.S (test_div_by_zero): Make label names
diff --git libgcc/config/nvptx/t-nvptx libgcc/config/nvptx/t-nvptx
index 08d3a67..34d68cc 100644
--- libgcc/config/nvptx/t-nvptx
+++ libgcc/config/nvptx/t-nvptx
@@ -7,3 +7,8 @@ LIB2FUNCS_EXCLUDE=__main
 
 crt0.o: $(srcdir)/config/nvptx/crt0.s
 	cp $< $@
+
+# Prevent building "advanced" stuff (for example, gcov support).  We don't
+# support it, and it may cause the build to fail, because of alloca usage, for
+# example.
+INHIBIT_LIBC_CFLAGS = -Dinhibit_libc


Grüße,
 Thomas

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