* pre-crt0.c (data_start): Initialize to 1.

This ports to compilers that optimize the external declaration
'int x = 0;' as if it were 'int x;' to shrink the executable.

diff --git a/src/ChangeLog b/src/ChangeLog
index 8397e3d26ec0f85128de57d36c94439b8d6f692e..95e58e2d92c311d304037e41f7dd35ae05c48458 100644 (file)
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2013-02-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+       * pre-crt0.c (data_start): Initialize to 1.
+       This ports to compilers that optimize the external declaration
+       'int x = 0;' as if it were 'int x;' to shrink the executable.
+
 2013-02-11  Paul Eggert  <eggert@cs.ucla.edu>
 
        Improve AIX port (Bug#13650).

diff --git a/src/pre-crt0.c b/src/pre-crt0.c
index ea5736eba2ac248435ddd5c6761cb8b04f062ec8..6b9618c8dc30437a1878a7dd58694879711b2d6c 100644 (file)
--- a/src/pre-crt0.c
+++ b/src/pre-crt0.c
@@ -4,7 +4,7 @@
    that make environ an initialized variable.  However, we do
    need to make sure the label data_start exists anyway.  */
 
-/* Create a label to appear at the beginning of data space.  */
-
-int data_start = 0;
+/* Create a label to appear at the beginning of data space.
+   Its value is nonzero so that it cannot be put into bss.  */
 
+int data_start = 1;