With libc++ 20 or higher graphics/podofo fails to build, with errors
similar to:
/wrkdirs/usr/ports/graphics/podofo/work/podofo-0.10.4/src/podofo/main/PdfColor.cpp:686:13: error: call to 'from_chars' is ambiguous
686 | if (std::from_chars(name.data() + 1, name.data() + name.size(), grayVal, chars_format::fixed).ec != std::errc())
| ^~~~~~~~~~~~~~~
/usr/include/c++/v1/__charconv/from_chars_floating_point.h:63:1: note: candidate function
63 | from_chars(const char* __first, const char* __last, double& __value, chars_format __fmt = chars_format::general) {
| ^
/wrkdirs/usr/ports/graphics/podofo/work/podofo-0.10.4/src/podofo/private/charconv_compat.h:34:30: note: candidate function
34 | inline from_chars_result from_chars(const char* first, const char* last,
| ^
This is because libc++ 20 started offering std::from_chars() for
floating point values, and pododo does not check for this. Correct the
WANT_FROM_CHARS check to correctly check for libc++ 20 or higher.
PR: 293181
Approved by: sunpoet (maintainer)
MFH: 2026Q1
Dimitry Andric
6d07173bab