Provide the MSYS paths in the pcp_platform_paths variable.
Add an IS_LINUX configure/platform_defs.h macro, so we can
key off that in the same way we do all the other platforms.
For Linux, isnan is a type-independent macro, which will
provide both isnand and isnanf depending on its argument.
Use it as such - previously we weren't correctly finding
isnand, and ended up using the crippled version in libpcp
(which ends up just mapping to isnanf).
Provide the MSYS paths in the pcp_platform_paths variable.
Add an IS_LINUX configure/platform_defs.h macro, so we can
key off that in the same way we do all the other platforms.
For Linux, isnan is a type-independent macro, which will
provide both isnand and isnanf depending on its argument.
Use it as such - previously we weren't correctly finding
isnand, and ended up using the crippled version in libpcp
(which ends up just mapping to isnanf).