Synchronize libiberty sources with FSF GCC mainline version.

[deliverable/binutils-gdb.git] / include / libiberty.h

diff --git a/include/libiberty.h b/include/libiberty.h
index 8f7d5f64930ee4111f1cce245c90c720c7b46b10..5b686ba26b6a4295df676eb4c7aeca8d72500990 100644 (file)
--- a/include/libiberty.h
+++ b/include/libiberty.h
@@ -397,6 +397,17 @@ extern void hex_init (void);
 /* Save files used for communication between processes.  */
 #define PEX_SAVE_TEMPS         0x4
 
+/* Max number of alloca bytes per call before we must switch to malloc.
+
+   ?? Swiped from gnulib's regex_internal.h header.  Is this actually
+   the case?  This number seems arbitrary, though sane.
+
+   The OS usually guarantees only one guard page at the bottom of the stack,
+   and a page size can be as small as 4096 bytes.  So we cannot safely
+   allocate anything larger than 4096 bytes.  Also care for the possibility
+   of a few compiler-allocated temporary stack slots.  */
+#define MAX_ALLOCA_SIZE        4032
+
 /* Prepare to execute one or more programs, with standard output of
    each program fed to standard input of the next.
    FLAGS       As above.