How to compile when you don't have libopus installed?

[wrn0]

I have to make this library for four different architectures. I was able to make that library for my computer's architecture by installing opus with brew. However, I now need to do the configure routine in a way that it checks for opus in my generated libopus.a file (that's built by me for these 4 libraries). Wherever I put the libopus.a and whatever options I try to add to the call it always tells me

checking pkg-config is at least version 0.9.0... yes
checking for DEPS... no
configure: error: Package requirements (opus >= 1.1) were not met:

No package 'opus' found

on my ./configure

I did export DEPS_LIBS=$HOME/Downloads/libopusenc-iOS/libopus.a and now the whole process gets much further but it stops at

------------------------------------------------------------------------
  libopusenc 0.2.1: Automatic configuration OK.

    Hidden visibility ............ yes

    API code examples ............ yes
    API documentation ............ no
------------------------------------------------------------------------


/Applications/Xcode.app/Contents/Developer/usr/bin/make  all-am
  CCLD     libopusenc.la

*** Warning: Linking the shared library libopusenc.la against the
*** static library /Users/T/Downloads/libopusenc-iOS/libopus.a is not portable!
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: archive member: .libs/libopusenc.a(libopus.a) fat file for cputype (7) cpusubtype (3) is not an object file (bad magic number)
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed
make[1]: *** [libopusenc.la] Error 1
make: *** [all] Error 2

[mark4o]

If you want to use a libopus that you have built and installed in a non-standard directory, set PKG_CONFIG_PATH to the directory where the opus.pc file was installed, before configuring libopusenc. For example:

export PKG_CONFIG_PATH=/home/me/opus-install/lib/pkgconfig
./configure