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app/internal: use pkg-config for finding system headers and libraries

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I've resisted relying on pkg-config in the hope that hard-coded include and
library paths would suffice. However, apart from having to work around some
distro-specific differences, building with hardcoded include paths fails when
building on a buildroot:

	x86_64-buildroot-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include/wayland'

(see #91)

Andri mentions a workaround (prefixing paths with "="), but that doesn't seem
to work on the BSDs.

Let's see how pkg-config fares. It's an extra dependency, but it promises to keep
us isolated from the varying paths on Linux distrobutions.

Updates #91

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-03-23 11:27:07 +01:00
parent 5d7fbd761f
commit 38ed6d1569
6 changed files with 14 additions and 10 deletions
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app/internal/glimpl/gl.go
+2 -1
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@@ -14,8 +14,9 @@ import (
/*
#cgo CFLAGS: -Werror
#cgo linux freebsd openbsd LDFLAGS: -lGLESv2
#cgo linux pkg-config: glesv2
#cgo linux freebsd LDFLAGS: -ldl
#cgo freebsd openbsd LDFLAGS: -lGLESv2
#cgo freebsd CFLAGS: -I/usr/local/include
#cgo freebsd LDFLAGS: -L/usr/local/lib
#cgo openbsd CFLAGS: -I/usr/X11R6/include