libthai does not make it into pango.pc
When statically linking programs which use pangocairo (e.g. i3), I get the following errors:
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libpango-1.0.a(break.o): In function `break_thai.isra.4':
(.text+0x1ef): undefined reference to `th_uni2tis'
(.text+0x247): undefined reference to `th_brk'
(.text+0x2f3): undefined reference to `th_brk'
This is because pango.pc is missing a dependency declaration for libthai. Once I manually add libthai to the Requires line in /usr/lib/x86_64-linux-gnu/pkgconfig/pango.pc, linking succeeds.
This is reproducible with latest HEAD at the time of writing (commit 5a7ef73e).