On Fri, Jan 11, 2002 at 10:22:24AM -0500, Thomas Hood wrote:
> This is useful information,
> because if someone later wants to modify the code to make
> this variable non-static, the comment tells that person that
> the variable will need an initializer.
Whether a variable is static or not doesn't change whether it ends up in
the bss segment or not.
/* top level */
static int foo;
int bar;
Both foo and bar will be initialised to 0 - since they're both placed
into the BSS segment (or maybe its common subsection):
$ gcc -S -o - t.c
@ Generated by gcc 2.96 20000731 (Red Hat Linux 7.1 2.96-80) for ARM/elf
.file "t.c"
gcc2_compiled.:
.bss
.align 2
foo:
.space 4
.comm bar, 4 @ 4
$ gcc -S -o - t.c -fno-common
@ Generated by gcc 2.96 20000731 (Red Hat Linux 7.1 2.96-80) for ARM/elf
.file "t.c"
gcc2_compiled.:
.bss
.align 2
foo:
.space 4
.global bar
.align 2
.type bar,object
.size bar,4
bar:
.space 4
-- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue Jan 15 2002 - 21:00:35 EST