emacs @30.1: error: incomplete definition of type 'struct dynarray_header'

[jwhowse4 (James Howse)]

I have an M4 ARM based Mac running Sequoia 15.3.1. The build for the port emacs @30.1_1 fails. The first set of apparent errors in the build log are as follows.

:info:build /usr/bin/clang -c -I/opt/macports/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk   -MMD -MF deps/lstat.d -MP -Wno-pointer-sign -Wno-string-plus-int -Wno-unknown-attributes -Wno-unknown-pragmas -Wno-initializer-overrides -Wno-tautological-compare -Wno-tautological-constant-out-of-range-compare -Wno-deprecated-declarations   -pipe -Os -Wno-attributes -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -arch arm64 -I. -I../src -I. -I../src   -DGL_COMPILE_CRYPTO_STREAM -o lstat.o lstat.c
:info:build malloc/dynarray_emplace_enlarge.c:30:41: warning: declaration of 'struct dynarray_header' will not be visible outside of this function [-Wvisibility]
:info:build    30 | __libc_dynarray_emplace_enlarge (struct dynarray_header *list,
:info:build       |                                         ^
:info:build malloc/dynarray_emplace_enlarge.c:34:11: error: incomplete definition of type 'struct dynarray_header'
:info:build    34 |   if (list->allocated == 0)
:info:build       |       ~~~~^
:info:build malloc/dynarray_emplace_enlarge.c:30:41: note: forward declaration of 'struct dynarray_header'
:info:build    30 | __libc_dynarray_emplace_enlarge (struct dynarray_header *list,
:info:build       |                                         ^

I have attached the complete build log. Any idea what is going wrong here?

I get the same error when trying to build the port emacs-app.

[jwhowse4 (James Howse)]

Full emacs build log

[jwhowse4 (James Howse)]

I forgot to add that I have Xcode 16.2 and the associated command line tools.

[ryandesign (Ryan Carsten Schmidt)]

#68414 reported the same thing with emacs-app and emacs-mac-app but no log files were provided there so we can't easily analyze that failure.

Comparing your log with our successful build on the build server, I see your build found lcms2 opportunistically. We should certainly fix that. But I don't know whether it is contributing to your build failure, especially since emacs-app declares a dependency on lcms2 and also builds fine on our build server. Still, you could test whether lcms2 is the cause of your emacs build failure by running:

sudo port clean emacs
sudo port -f deactivate lcms2
sudo port install emacs
sudo port activate lcms2

[ryandesign (Ryan Carsten Schmidt)]

The error is also mentioned in #62804. There, I suspect the problem is caused by having the hdf4 port installed, so try:

sudo port clean emacs
sudo port -f deactivate hdf4
sudo port install emacs
sudo port activate hdf4

[jwhowse4 (James Howse)]

Thank you very much for your suggestions. Deactivating lcms2 resulted in the same error during the build. However deactivating hdf4, which was installed as part of netcdf, resulted in a successful build of both emacs and emacs-app. So at least on my system the problem was hdf4 and my non-standard netcdf configuration.

[massonseb]

I had exactly the same error. Once deactivating hdf4, emacs compiled perfectly. Thanks a lot for the tip!

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #73051.

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #73609.

[ryandesign (Ryan Carsten Schmidt)]

In b97be474c9897a1e3c9c1383fc3ebe06a4f600d6/macports-ports (master):

emacs*: Avoid build failure when hdf4 is installed

Or when other generically-named headers are installed in $prefix/include.

Closes: #62804
Closes: #67960
Closes: #68414
Closes: #72124