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-rw-r--r--contrib/gcc/config/x-svr49
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diff --git a/contrib/gcc/config/x-svr4 b/contrib/gcc/config/x-svr4
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+# Some versions of SVR4 have an alloca in /usr/ucblib/libucb.a, and if we are
+# careful to link that in after libc we can use it, but since newer versions of
+# SVR4 are dropping libucb, it is better to just use the portable C version for
+# bootstrapping. Do this by defining ALLOCA.
+
+ALLOCA = alloca.o
+
+# See all the declarations.
+FIXPROTO_DEFINES = -D_XOPEN_SOURCE
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