3d97f40858
This GCC patch was needed in order to successfully build a cross-compilation toolchain under buildroot on Ubuntu 14.04. The patch is included in later GCC releases, so we probably can drop this once we upgrade GCC.
43 lines
1.6 KiB
Diff
43 lines
1.6 KiB
Diff
Avoid GCC 4.6 segfaults
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Buildroot's attempt to build a GCC 4.6.x cross-compilation toolchain might fail
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with something like
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/some/path/buildroot-2013.02/output/toolchain/gcc-4.6.3/libgcc/../gcc/libgcc2.c: In function ‘__negdi2’:
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/some/path/buildroot-2013.02/output/toolchain/gcc-4.6.3/libgcc/../gcc/libgcc2.c:72:1: internal compiler error: Segmentation fault
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This patch is revision 191605 for GCC 4.7.x
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(<https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=191605>). Applying it
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to 4.6.x seems to prevent this crash.
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Save this file as
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buildroot-2013.02/toolchain/gcc/4.6.3/999-ira-int.patch
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to have buildroot apply this patch to GCC 4.6.x source before trying to build
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it.
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See also <https://gcc.gnu.org/ml/gcc-help/2014-03/msg00049.html>
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Index: buildroot-2013.02/toolchain/gcc/4.6.3/999-ira-int.patch
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ buildroot-2013.02/toolchain/gcc/4.6.3/999-ira-int.patch 2015-03-29 00:09:28.000000000 -0400
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@@ -0,0 +1,18 @@
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+--- gcc-4_7-branch/gcc/ira-int.h 2012/09/21 09:19:39 191604
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++++ gcc-4_7-branch/gcc/ira-int.h 2012/09/21 10:08:35 191605
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+@@ -1138,8 +1138,13 @@
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+ ira_allocno_object_iter_cond (ira_allocno_object_iterator *i, ira_allocno_t a,
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+ ira_object_t *o)
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+ {
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+- *o = ALLOCNO_OBJECT (a, i->n);
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+- return i->n++ < ALLOCNO_NUM_OBJECTS (a);
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++ int n = i->n++;
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++ if (n < ALLOCNO_NUM_OBJECTS (a))
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++ {
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++ *o = ALLOCNO_OBJECT (a, n);
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++ return true;
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++ }
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++ return false;
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+ }
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+
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+ /* Loop over all objects associated with allocno A. In each
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