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src/subversion/configure.ac  view on Meta::CPAN

dnl Use -Wl,--no-undefined during linking of some libraries
AC_ARG_ENABLE(disallowing-of-undefined-references,
  [AS_HELP_STRING([--enable-disallowing-of-undefined-references],
                  [Use -Wl,--no-undefined flag during linking of some libraries to disallow undefined references])])
if test "$enable_disallowing_of_undefined_references" != "yes" && test "`uname`" != "Linux"; then
  enable_disallowing_of_undefined_references="no"
fi
if test "$enable_disallowing_of_undefined_references" != "no"; then
  AC_MSG_CHECKING([for -Wl,--no-undefined])
  old_LDFLAGS="$LDFLAGS"
  LDFLAGS="$LDFLAGS -Wl,--no-undefined"
  AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(){;}]])], [svn_wl_no_undefined="yes"], [svn_wl_no_undefined="no"])
  LDFLAGS="$old_LDFLAGS"
  if test "$svn_wl_no_undefined" = "yes"; then
    AC_MSG_RESULT([yes])
    for library_dir in "$abs_srcdir/subversion/libsvn_"*; do
      eval "`basename $library_dir`_LDFLAGS=-Wl,--no-undefined"
    done
  else
    AC_MSG_RESULT([no])
    if test "$enable_disallowing_of_undefined_references" = "yes"; then
      AC_MSG_ERROR([--enable-disallowing-of-undefined-references explicitly requested, but -Wl,--no-undefined not supported])
    fi
  fi
fi
AC_SUBST([libsvn_auth_gnome_keyring_LDFLAGS])
AC_SUBST([libsvn_auth_kwallet_LDFLAGS])
AC_SUBST([libsvn_client_LDFLAGS])
AC_SUBST([libsvn_delta_LDFLAGS])
AC_SUBST([libsvn_diff_LDFLAGS])
AC_SUBST([libsvn_fs_LDFLAGS])
AC_SUBST([libsvn_fs_base_LDFLAGS])
AC_SUBST([libsvn_fs_fs_LDFLAGS])
AC_SUBST([libsvn_fs_util_LDFLAGS])
AC_SUBST([libsvn_ra_LDFLAGS])
AC_SUBST([libsvn_ra_local_LDFLAGS])
AC_SUBST([libsvn_ra_serf_LDFLAGS])
AC_SUBST([libsvn_ra_svn_LDFLAGS])
AC_SUBST([libsvn_repos_LDFLAGS])
AC_SUBST([libsvn_subr_LDFLAGS])
AC_SUBST([libsvn_wc_LDFLAGS])


AC_ARG_ENABLE(maintainer-mode,
AS_HELP_STRING([--enable-maintainer-mode],
               [Turn on debugging and very strict compile-time warnings]),
[
    if test "$enableval" = "yes" ; then
      if test "$enable_debugging" = "no" ; then
        AC_MSG_ERROR([Can't have --disable-debug and --enable-maintainer-mode])
      fi
      enable_debugging=yes

      dnl Enable some extra warnings. Put these before the user's flags
      dnl so the user can specify flags that override these.
      if test "$GCC" = "yes"; then
        AC_MSG_NOTICE([maintainer-mode: adding GCC warning flags])

        dnl some additional flags that can be handy for an occasional review,
        dnl but throw too many warnings in svn code, of too little importance,
        dnl to keep these enabled. Remove the "dnl" to do a run with these
        dnl switches enabled.
        dnl ./configure CUSERFLAGS="-Wswitch-enum -Wswitch-default"

        dnl Add each of the following flags only if the C compiler accepts it.
        CFLAGS_KEEP="$CFLAGS"
        CFLAGS=""

        SVN_CFLAGS_ADD_IFELSE([-Werror=implicit-function-declaration])
        SVN_CFLAGS_ADD_IFELSE([-Werror=declaration-after-statement])
        SVN_CFLAGS_ADD_IFELSE([-Wextra-tokens])
        SVN_CFLAGS_ADD_IFELSE([-Wnewline-eof])
        SVN_CFLAGS_ADD_IFELSE([-Wshorten-64-to-32])
        SVN_CFLAGS_ADD_IFELSE([-Wold-style-definition])
        SVN_CFLAGS_ADD_IFELSE([-Wno-system-headers])
        SVN_CFLAGS_ADD_IFELSE([-Wno-format-nonliteral])

        CMAINTAINERFLAGS="$CFLAGS $CMAINTAINERFLAGS"
        CFLAGS="$CFLAGS_KEEP"

        dnl Add flags that all versions of GCC (should) support
        CMAINTAINERFLAGS="-Wall -Wpointer-arith -Wwrite-strings -Wshadow -Wformat=2 -Wunused -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wno-multichar -Wredundant-decls -Wnested-externs -Winline -Wno-long-long ...
      fi
      if test "$GXX" = "yes"; then
        AC_MSG_NOTICE([maintainer-mode: adding G++ warning flags])

        dnl Add each of the following flags only if the C++ compiler accepts it.
        CXXFLAGS_KEEP="$CXXFLAGS"
        CXXFLAGS=""

        SVN_CXXFLAGS_ADD_IFELSE([-Wextra-tokens])
        SVN_CXXFLAGS_ADD_IFELSE([-Wnewline-eof])
        SVN_CXXFLAGS_ADD_IFELSE([-Wshorten-64-to-32])
        SVN_CXXFLAGS_ADD_IFELSE([-Wno-system-headers])

        CXXMAINTAINERFLAGS="$CXXFLAGS $CXXMAINTAINERFLAGS"
        CXXFLAGS="$CXXFLAGS_KEEP"

        dnl Add flags that all versions of G++ (should) support
        CXXMAINTAINERFLAGS="-Wall -Wpointer-arith -Wwrite-strings -Wshadow -Wunused -Wunreachable-code $CXXMAINTAINERFLAGS"
      fi
    fi
])

if test "$enable_debugging" = "yes" ; then
  dnl At the moment, we don't want optimization, because we're
  dnl debugging. Unless optiization was explicitly enabled.
  if test "$enable_optimization" != "yes"; then
    AC_MSG_NOTICE([Disabling optimizations for debugging])
    CFLAGS=["`echo $CFLAGS' ' | $SED -e 's/-O[^ ]* //g'`"]
    CXXFLAGS=["`echo $CXXFLAGS' ' | $SED -e 's/-O[^ ]* //g'`"]
  fi
  dnl Add debugging flags, unless they were set by the user
  if test -z ["`echo $CUSERFLAGS' ' | $EGREP -- '-g[0-9]? '`"]; then
    AC_MSG_NOTICE([Enabling debugging for C])
    CFLAGS=["`echo $CFLAGS' ' | $SED -e 's/-g[0-9] //g' -e 's/-g //g'`"]
    SVN_CFLAGS_ADD_IFELSE([-fno-inline])
    SVN_CFLAGS_ADD_IFELSE([-fno-omit-frame-pointer])
    SVN_CFLAGS_ADD_IFELSE([-g3],[],[
      SVN_CFLAGS_ADD_IFELSE([-g2],[],[