pdflib @7.0.5p3: fatal error: 'fp.h' file not found

[cmmccallum]

Building grace, which requires PDFLib, which seems to try to install PDFLib-Lite. Fails with the "Configuration logfiles contain indicators of -Wimplicit-function-declaraion Other Macport notes mention that this is common and needs to be fixed.

Macports 2.10.5 current on OS X Sequoia 15.2

[jmroot (Joshua Root)]

Please attach the main.log and config.log.

[cmmccallum]

config.log

[cmmccallum]

There is no file main.log.

[ryandesign (Ryan Carsten Schmidt)]

There should be a main.log file unless you removed it or the build succeeded. Its location would be printed by running the command port logfile pdflib.

The config.log is enough to see where there is an error in the configure script, but to see where the build ultimately failed we need to see the main.log.

On my system, the build fails with:

./pngconf.h:391:16: fatal error: 'fp.h' file not found
  391 | #      include <fp.h>
      |                ^~~~~~

Fixing the implicit function declaration does not fix the build error for me. I suspect it will be the same for you.

[ryandesign (Ryan Carsten Schmidt)]

In 18e21425ab90e19ef574903a2b103d1a13d29c74/macports-ports (master):

pdflib: Fix another implicit function declaration

See: #71998

[ryandesign (Ryan Carsten Schmidt)]

The fp.h problem is a libpng bug only seen on recent versions of clang and described and fixed here:

​https://github.com/pnggroup/libpng/pull/529

[ryandesign (Ryan Carsten Schmidt)]

In 9817ed4b6c956f06d0fd249037614e5770301f41/macports-ports (master):

pdflib: Fix build with recent clang

Closes: #71998

[cmmccallum]

main.log from 'port install pdflib'

[ryandesign (Ryan Carsten Schmidt)]

Ok, your log shows yet a different error:

fatal error: 'string' file not found

Try ProblemHotlist#clts16 for that.

[cmmccallum]

OK that seems to have done it. Thanks for your help!