Re: [Gc] os_dep.c Cygwin ASM patch

Ivan Maidanski ivmai at
Wed Sep 5 15:24:12 PDT 2012

Hi Colin,

Thank you for the reporting & fixing the problem.
I've pushed your fix (with my log comment) to bdwgc 7.2 and 7.3 branches.

* fix:
* gc7.2 hotfix branch:
* gc7.3 development (master):


Wed, 5 Sep 2012 12:38:28 -0500 Colin LeMahieu <clemahieu at>:
> On the latest Cygwin, 6.1, using clang 3.1 when compiling libgc it
> fails while linking with:
> /cygdrive/c/gc-7.2/os_dep.c:774: undefined reference to `_25_fs_3A_4'
> Attached is a patch that slightly changes how the ASM is formed.

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