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Re: Strange errors running gcc tests on Cygwin
On 03/05/2017 05:08 AM, David Billinghurst wrote:
LD_LIBRARY_PATH is used by dlopen ().
PATH is one of the locations searched by Windows when starting
applications, see https://msdn.microsoft.com/en-us/library/7d83bc18.aspx
Thank you for this clarification. So load-time dlls are resolved (in
ntdll.exe or some such) using PATH and run-time dlls loaded with
dlopen() are resolved with LD_LIBRARY_PATH? I'm obviously not intimate
with Cygwin's architecture, but I'm guessing that explicitly using
LoadLibrary is still going to use PATH.
So it seems that libgcc on Cygwin is called cyggcc_s-seh-1.dll on lives
in /usr/bin. This makes the gcc test harness's attempt to switch
between host and target compilers problematic because we can't remove
/usr/bin from the PATH. We can can prepend the built-tree's path, but
it's still a bit unsettling that, if something goes wrong with the
build-tree, we can still end up loading the installed libgcc instead of
failing. Still, it will be better than the current situation.
Thank you for your help with this.
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