gbranden pushed a commit to branch master
in repository groff.
commit 5669247d85fcfcdcb2e09c35ff8f22261160107b
Author: G. Branden Robinson <[email protected]>
AuthorDate: Mon Mar 23 16:04:23 2026 -0500
[build]: Drop `GROFF_CXX_CHECK` "configure" macro.
* configure.ac: Stop interpolating `GROFF_CXX_CHECK` macro.
* m4/groff.m4 (GROFF_CXX_CHECK): Delete macro definition. It dates back
at least to groff 1.10 (1995). ISO standardized C++ in 1998; it no
longer seems necessary in 2026 to check that a purported C++ compiler
validly compiles a `main()` that simply returns `0`, nor that it
correctly arranges for constructors and destructors of statically
allocated objects to run. A C++ compiler failing to meet these
criteria is not fit for purpose; working alternatives are universally
available.
---
ChangeLog | 12 ++++++++++
configure.ac | 1 -
m4/groff.m4 | 72 ------------------------------------------------------------
3 files changed, 12 insertions(+), 73 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 0f2648cff..716ccf5cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2026-03-23 G. Branden Robinson <[email protected]>
+
+ * configure.ac: Stop interpolating `GROFF_CXX_CHECK` macro.
+ * m4/groff.m4 (GROFF_CXX_CHECK): Delete macro definition. It
+ dates back at least to groff 1.10 (1995). ISO standardized C++
+ in 1998; it no longer seems necessary in 2026 to check that a
+ purported C++ compiler validly compiles a `main()` that simply
+ returns `0`, nor that it correctly arranges for constructors and
+ destructors of statically allocated objects to run. A C++
+ compiler failing to meet these criteria is not fit for purpose;
+ working alternatives are universally available.
+
2026-03-22 G. Branden Robinson <[email protected]>
* src/roff/troff/input.cpp (char_list::set, char_list::get):
diff --git a/configure.ac b/configure.ac
index e90ce446f..46e1cdd94 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,6 @@ AC_PROG_CC
AC_PROG_CXX
gl_EARLY
gl_INIT
-GROFF_CXX_CHECK
GROFF_CMD_FILES
GROFF_X11
GROFF_APPDEFDIR_OPTION
diff --git a/m4/groff.m4 b/m4/groff.m4
index e0b81a9ef..fbe3d07f3 100644
--- a/m4/groff.m4
+++ b/m4/groff.m4
@@ -990,78 +990,6 @@ AC_DEFUN([GROFF_PAGE], [
])
-AC_DEFUN([GROFF_CXX_CHECK],
- [AC_REQUIRE([AC_PROG_CXX])
- AC_LANG_PUSH([C++])
- if test "$cross_compiling" = no; then
- AC_MSG_CHECKING([that C++ compiler can compile simple program])
- fi
- AC_RUN_IFELSE([
- AC_LANG_SOURCE([[
-
-int main() {
- return 0;
-}
-
- ]])
- ],
- [AC_MSG_RESULT([yes])],
- [AC_MSG_RESULT([no])
- AC_MSG_ERROR([a working C++ compiler is required])],
- [:])
-
- if test "$cross_compiling" = no; then
- AC_MSG_CHECKING([that C++ static constructors and destructors are called])
- fi
- AC_RUN_IFELSE([
- AC_LANG_SOURCE([[
-
-extern "C" {
- void _exit(int);
-}
-
-int i;
-struct A {
- char dummy;
- A() { i = 1; }
- ~A() { if (i == 1) _exit(0); }
-};
-
-A a;
-
-int main()
-{
- return 1;
-}
-
- ]])
- ],
- [AC_MSG_RESULT([yes])],
- [AC_MSG_RESULT([no])
- AC_MSG_ERROR([a working C++ compiler is required])],
- [:])
-
- AC_MSG_CHECKING([that header files support C++])
- AC_LINK_IFELSE([
- AC_LANG_PROGRAM([[
-
-#include <stdio.h>
-
- ]],
- [[
-
-fopen(0, 0);
-
- ]])
- ],
- [AC_MSG_RESULT([yes])],
- [AC_MSG_RESULT([no])
- AC_MSG_ERROR([header files do not support C++
- (if you are using a version of gcc/g++ earlier than 2.5,
- you should install libg++)])])
- AC_LANG_POP([C++])])
-
-
AC_DEFUN([GROFF_TMAC],
[AC_MSG_CHECKING([file name prefix of system macro packages])
sys_tmac_prefix=
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