Issues

• Feature request: #elifdef and #elifndef from C23

  enhancement
  ned14/pcpp#106 · Filter by author peterjc opened on Mar 29, 2026
  1

• -D and -U options processed in the wrong order.

  ned14/pcpp#105 · Filter by author mrolle45 opened on Feb 10, 2026

• Multiple input files are concatenated, UNLIKE GCC

  ned14/pcpp#104 · Filter by author mrolle45 opened on Feb 10, 2026

• Deferred expansion doesn't work correctly

  bug
  ned14/pcpp#102 · Filter by author user202729 opened on Jan 23, 2025
  2

• #include "filename" incorrectly (?) looks in ancestor directories

  bug
  ned14/pcpp#99 · Filter by author mrolle45 opened on Jul 17, 2024
  1

• #include guard containing whitespace is not detected.

  bug
  ned14/pcpp#96 · Filter by author mrolle45 opened on Feb 4, 2024
  1

• Unterminated char or string literal should raise an error.

  enhancement
  ned14/pcpp#95 · Filter by author mrolle45 opened on Jan 19, 2024
  1

• # operator keeps comments in the result

  bug
  ned14/pcpp#94 · Filter by author mrolle45 opened on Jan 18, 2024
  1

• ## next to whitespace concatentes with the whitespace.

  bug
  ned14/pcpp#93 · Filter by author mrolle45 opened on Jan 18, 2024
  1

• #include "..." parses the file name incorrectly. It is **not** a string literal.

  enhancement
  ned14/pcpp#89 · Filter by author mrolle45 opened on Jan 5, 2024
  2

• Function macro is expanded if a preprocessor directive separates it from its arguments.

  enhancement
  ned14/pcpp#88 · Filter by author mrolle45 opened on Jan 3, 2024
  1

• Unfound includes passed through despite NO --passthru-unfound-includes

  question
  ned14/pcpp#85 · Filter by author mara004 opened on Dec 14, 2023
  22

• Feature request: consider support for __VA_OPT__

  enhancement
  ned14/pcpp#78 · Filter by author willwray opened on Nov 21, 2022
  1

• Header with only macro definitions are silently processed without leaving a trace in the final preprocessed output.

  enhancement
  ned14/pcpp#35 · Filter by author smwikipedia opened on Nov 22, 2019
  1