macOS 26: fatal error: 'ffi.h' file not found #94
Description
(used brew to install most of the prerequisites, then went to)
% cabal v1-install tidal (as mentioned in https://raw.githubusercontent.com/tidalcycles/tidal-bootstrap/master/tidal-bootstrap.command)
output stuttered in
[...]
Building library for clock-0.8.4...
[1 of 2] Compiling System.Clock ( dist/build/System/Clock.hs, dist/build/System/Clock.o, dist/build/System/Clock.dyn_o )
System/Clock.hsc:134:44: warning: [GHC-90584] [-Wderiving-typeable]
• Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable
• In the data declaration for ‘Clock’
|
134 | deriving (Eq, Enum, Generic, Read, Show, Typeable)
| ^^^^^^^^
System/Clock.hsc:235:36: warning: [GHC-90584] [-Wderiving-typeable]
• Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable
• In the data declaration for ‘TimeSpec’
|
235 | } deriving (Generic, Read, Show, Typeable)
| ^^^^^^^^
In file included from /var/folders/d8/plt8hkrj51l4vdplxlwbfrrw0000gn/T/ghc73147_tmp_0_0/ghc_tmp_0_2.c:4:0: error:
/opt/homebrew/Cellar/ghc/9.12.2/lib/ghc-9.12.2/lib/../lib/aarch64-osx-ghc-9.12.2-inplace/rts-1.0.2/include/rts/ghc_ffi.h:28:10: error:
fatal error: 'ffi.h' file not found
28 | #include "ffi.h"
| ^~~~~~~
|
28 | #include "ffi.h"
| ^
1 error generated.
<no location info>: error:
`clang' failed in phase `C Compiler'. (Exit code: 1)
cabal: Leaving directory '/var/folders/d8/plt8hkrj51l4vdplxlwbfrrw0000gn/T/cabal-tmp-73008/clock-0.8.4'
gcc showed includes being used as
% gcc -E -Wp,-v -
clang -cc1 version 17.0.0 (clang-1700.4.4.1) default target arm64-apple-darwin25.1.0
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include"
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/17/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/SubFrameworks (framework directory)
End of search list.
# 1 "<stdin>"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 466 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "<stdin>" 2
went hunting down ffi.h
% cd /Applications/Xcode.app/Contents/Developer
% find . -name ffi.h
./Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h
huh,
did
mkdir -p /usr/local/include
echo '#include "ffi/ffi.h"' > /usr/local/include/ffi.h
Compile was now successful.
Not sure if this is 26 oddity, or some brew oddity (I think not), but maybe its helpful for others.