[Bug 297545] graphics/png: compile failure: png.h: symbol 200 both exported as '0' and removed as 'png_get_io_chunk_name'

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297545

            Bug ID: 297545
           Summary: graphics/png: compile failure: png.h: symbol 200 both
                    exported as '0' and removed as 'png_get_io_chunk_name'
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: [email protected]
          Reporter: [email protected]
          Assignee: [email protected]
             Flags: maintainer-feedback?([email protected])

On CURRENT (16.0-CURRENT #4 main-n288314-06aaca43fe05: Sat Aug 15 08:07:26 CEST
2026 amd64) rebuilding port graphics/png fails due to an error as schown below:

[...]
[  7% 6/54] cd /usr/ports/graphics/png/work/.build && /usr/local/bin/cmake
-DINPUT=/usr/ports/graphics/png/work/libpng-1.6.58/scripts/symbols.c
-DOUTPUT=/usr/ports/graphics/png/work/.build/scripts/symbols.out -P
/usr/ports/graphics/png/work/.build/scripts/cmake/genout.cmake
[  9% 7/54] cd /usr/ports/graphics/png/work/.build && /usr/local/bin/cmake
-DINPUT=/usr/ports/graphics/png/work/.build/scripts/symbols.out
-DOUTPUT=/usr/ports/graphics/png/work/.build/scripts/symbols.chk -P
/usr/ports/graphics/png/work/.build/scripts/cmake/genchk.cmake
FAILED: [code=1] scripts/symbols.chk
/usr/ports/graphics/png/work/.build/scripts/symbols.chk 
cd /usr/ports/graphics/png/work/.build && /usr/local/bin/cmake
-DINPUT=/usr/ports/graphics/png/work/.build/scripts/symbols.out
-DOUTPUT=/usr/ports/graphics/png/work/.build/scripts/symbols.chk -P
/usr/ports/graphics/png/work/.build/scripts/cmake/genchk.cmake
png.h: symbol 200 both exported as '0' and removed as 'png_get_io_chunk_name'
*** A new list is in /usr/ports/graphics/png/work/.build/scripts/symbols.new
***
CMake Error at scripts/cmake/genchk.cmake:37 (message):
  Failed to generate /usr/ports/graphics/png/work/.build/scripts/symbols.new

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