Ogg M4 script ignores sysroot setting

[dos1]

When cross-compiling and invoking configure with parameters like --with-sysroot=/foo --prefix=/usr, FLAC finds libogg installed in host's /usr, adding it to include path and wreaking havok.

Looking into ogg.m4, it seems like while $prefix is one of the places being checked, it doesn't include the sysroot at all. I don't know much about autotools, but replacing things like OGG_LIBS="-L$prefix/lib" with OGG_LIBS="-L$sysroot/$prefix/lib" might be enough.

A workaround is to specify path manually using --with-ogg.

[erikd]

Things like --with-ogg are specifically intended for situations like cross compiling.

I don't really think there is anything here that needs fixing.

[dos1]

Really? It doesn't really feel elegant, as specifying --with-sysroot should usually provide enough data to correctly find all dependencies while cross compiling (unless Ogg has been installed to non-standard location, but that can happen without cross compiling as well). Repeating the path manually for each dependency (in this case just one, but you get the point :P) seems redundant.

[erikd]

Well patch accepted.

[neheb]

I would guess this is not the case with CMake?

[erikd]

I would guess this is not the case with CMake?

Sorry, wat? That question is highly ambiguous. Care to clarify?

[ktmf01]

@rillian Should this issue be transferred to the ogg repository? It might be other projects depending on libogg are affected?