From 737e4432b978eb4b9f5b10fb6cc6d9c883a5d17a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?= Date: Wed, 7 Jul 2021 10:16:48 +0900 Subject: [PATCH] configure: add -Wl,--no-as-needed It is reported that combination of `--enable-shared --with-jemalloc` breaks on Debian bullseye (testig). Deeper investigation revealed that this system's `ld(1)` is patched, to turn `ld --as-needed` on by default. This linker flag strips "unnecessary" library dependencies from an executable. In case of `ruby(1)` (of `--enable-shared`), because everything is in `libruby.so`, the binary itself doesn't include any calls to `malloc(3)` at all. So in spite of our explicit `-ljemalloc` flag, it is ignored. Libc's one is chosen instead. This is not what we want. Let's force our `ruby(1)` link what we want. Fixes https://github.com/ruby/ruby/pull/4627 The author would like to acknowledge Akihiko Odaki for their contributions. --- configure.ac | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/configure.ac b/configure.ac index 0acadac2e6..9ce7538aae 100644 --- a/configure.ac +++ b/configure.ac @@ -3383,6 +3383,11 @@ AS_CASE("$enable_shared", [yes], [ AC_DEFINE_UNQUOTED(LIBDIR_BASENAME, ["${libdir_basename}"]) libdir_basename="${libdir_basename}"${multiarch+'/${arch}'} + RUBY_TRY_LDFLAGS([${linker_flag}--no-as-needed], [no_as_needed=yes], [no_as_needed=no]) + AS_IF([test "$no_as_needed" = yes], [ + RUBY_APPEND_OPTIONS(LDFLAGS, [${linker_flag}--no-as-needed]) + ]) + AS_CASE(["$target_os"], [freebsd*|dragonfly*], [], [