On Friday, April 15, 2011 18:23:03 Gilles wrote: > On Thu, 14 Apr 2011 21:07:07 -0500 (CDT), Bob Friesenhahn > > <[email protected]> wrote: > >The proper solution for this is to have configure test for both fork() > >and vfork() (and maybe posix_spawn()). Then you have to decide which > >one you prefer: > > > >In configure.ac: > > > >AC_CHECK_FUNCS([fork posix_spawnp spawnvp vfork]) > > > >In the program: > > > >#if HAVE_VFORK > > > > use vfork > > Thanks Bob, but some applications don't use conditional compiling and > simply use code like this: > ============ > if (uClinux) { > *pid = vfork(); > } else { > *pid = fork(); > } > ============
so change it to #ifdef > Will the cross-compiler go ahead and compile that type of code? > Currently, it refuses to proceed because fork() is not available on > non-MMU CPU's. it depends on the optimization level. you need a high enough level where the compiler will do dead code removal, otherwise it wont link. -mike
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