kc3-lang/libbsd/m4/libbsd-linker.m4

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• Hash : 30b48ed9
  Author :
  Date : 2023-05-26T23:50:10
  

  build: Refactor linker script detection into a new m4 function

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• m4/libbsd-linker.m4

• # Copyright © 2019, 2022 Guillem Jover <guillem@hadrons.org>
  
  # LIBBSD_LINKER_VERSION_SCRIPT
  # ----------------------------
  AC_DEFUN([LIBBSD_LINKER_VERSION_SCRIPT], [
    AC_CACHE_CHECK([if ld supports --version-script flag],
      [libbsd_cv_version_script], [
      echo "{ global: symbol; local: *; };" >conftest.map
      save_LDFLAGS=$LDFLAGS
      LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
      AC_LINK_IFELSE([
        AC_LANG_PROGRAM([[
  extern int symbol(void);
  int symbol(void) { return 0; }
  ]], [[
  ]])
      ], [
        libbsd_cv_version_script=yes
      ], [
        libbsd_cv_version_script=no
      ])
      LDFLAGS="$save_LDFLAGS"
      rm -f conftest.map
    ])
    AM_CONDITIONAL([HAVE_LINKER_VERSION_SCRIPT],
      [test "x$libbsd_cv_version_script" = "xyes"])
  ])
  

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