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docs: add FUSE packaging tip for Darwin

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midchildan 2021-04-01 22:45:16 +09:00
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doc/builders/packages/fuse.section.md
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@ -17,3 +17,29 @@ following, it's a likely sign that you need to have macFUSE installed.
Referenced from: /nix/store/w8bi72bssv0bnxhwfw3xr1mvn7myf37x-sshfs-fuse-2.10/bin/sshfs
Reason: image not found
[1] 92299 abort /nix/store/w8bi72bssv0bnxhwfw3xr1mvn7myf37x-sshfs-fuse-2.10/bin/sshfs
Package maintainers may often encounter the following error when building FUSE
packages on macOS:
checking for fuse.h... no
configure: error: No fuse.h found.
This happens on autoconf based projects that uses `AC_CHECK_HEADERS` or
`AC_CHECK_LIBS` to detect libfuse, and will occur even when the `fuse` package
is included in `buildInputs`. It happens because libfuse headers throw an error
on macOS if the `FUSE_USE_VERSION` macro is undefined. Many proejcts do define
`FUSE_USE_VERSION`, but only inside C source files. This results in the above
error at configure time because the configure script would attempt to compile
sample FUSE programs without defining `FUSE_USE_VERSION`.
There are two possible solutions for this problem in Nixpkgs:
1. Pass `FUSE_USE_VERSION` to the configure script by adding
`CFLAGS=-DFUSE_USE_VERSION=25` in `configureFlags`. The actual value would
have to match the definition used in the upstream source code.
2. Remove `AC_CHECK_HEADERS` / `AC_CHECK_LIBS` for libfuse.
However, a better solution might be to fix the build script upstream to use
`PKG_CHECK_MODULES` instead. This approach wouldn't suffer from the problem that
`AC_CHECK_HEADERS`/`AC_CHECK_LIBS` has at the price of introducing a dependency
on pkg-config.