Commit a078b8cd57b007c3820c5f43a89b31bc579cbb63
2018-07-04T20:18:48
regex: work around conditional-dependencies glitch * modules/regex (Depends-on): Add langinfo. Without this change, I had problems building an experimental version of GNU Emacs. The symptom of the bug was a message ‘./configure: line 12726: test: =: unary operator expected’. This was due to a line in gl_FUNC_NL_LANGINFO that invokes ‘test $HAVE_LANGINFO_CODESET = 1’ even though HAVE_LANGINFO_CODESET was unset. Although gl_FUNC_NL_LANGINFO has ‘AC_REQUIRE([gl_LANGINFO_H])’ and gl_LANGINFO_H always sets HAVE_LANGINFO_CODESET to 0 or 1, gnulib-tool with --conditional-dependencies sometimes arranges for the gl_FUNC_NL_LANGINFO code to be executed before the gl_LANGINFO_H code. Since the regex code includes <langinfo.h> it should be depending on the langinfo module anyway, and this happens to work around the bug, so install that as a workaround for now. To reproduce the original problem, run the following shell script on the version of Gnulib just before this patch was installed. rm -fr foo mkdir foo cat >foo/configure.ac <<'EOF' AC_INIT(GNU Emacs, 27.0.50, bug-gnu-emacs@gnu.org, , https://www.gnu.org/software/emacs/) gl_EARLY gl_INIT AC_OUTPUT EOF ./gnulib-tool --import --conditional-dependencies --gnu-make --dir foo regex ./gnulib-tool --copy build-aux/install-sh foo/install-sh ./gnulib-tool --copy build-aux/config.sub foo/config.sub ./gnulib-tool --copy build-aux/config.guess foo/config.guess cd foo aclocal -I m4 autoconf ./configure --with-included-regex