library: check d/o escape seq value <= 255, better error messages

GUI: cliwindow: `#if _WIN32` -> `#ifdef _WIN32`, add "-Wundef"
  check to cmake
cmake: backend: add C90 (C89) compat compiler check
docs: update "README" pandoc, "README.linux" (Fedora 39 -> 40)
tests: test_png: add some more text examples
This commit is contained in:
gitlost
2024-09-29 15:18:56 +01:00
parent b42d5baf4c
commit 34be69d241
14 changed files with 208 additions and 169 deletions

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