Messages in this thread | | | Date | Fri, 11 Jan 2002 15:40:16 +0000 | From | Russell King <> | Subject | Re: [PATCH] Combined APM patch |
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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
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