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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