diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/configure.in b/configure.in index c4c7fad5d..42f7beacc 100644 --- a/configure.in +++ b/configure.in @@ -25,6 +25,7 @@ AC_ARG_PROGRAM # Get 'install' or 'install-sh' and its variants. AC_PROG_INSTALL +AC_PROG_LN_S sinclude(config/acx.m4) @@ -2247,6 +2248,36 @@ case $build in esac AC_SUBST(stage1_cflags) +# It makes debugging easier if we create as symlinks the stage directories +# gcc for stageN-gcc and stage-prev for stage(N-1). In case this is not +# possible, however, we can resort to mv. +AC_CACHE_CHECK([if symbolic links between directories work], +[gcc_cv_prog_ln_s_dir], +[if test "${LN_S}" = "ln -s" \ + && mkdir confdir.s1 \ + && ln -s confdir.s1 confdir.s2 \ + && echo timestamp1 > confdir.s1/conftest.1 \ + && cmp confdir.s1/conftest.1 confdir.s2/conftest.1 \ + && echo timestamp2 > confdir.s2/conftest.2 \ + && cmp confdir.s1/conftest.2 confdir.s1/conftest.2 \ + && rm -f confdir.s2; then + gcc_cv_prog_ln_s_dir=yes +else + gcc_cv_prog_ln_s_dir=yes +fi +rm -rf confdir.s1 confdir.s2]) + +case ${gcc_cv_prog_ln_s_dir} in + yes) + CREATE_LINK_TO_DIR='ln -s $$1 $$2' + UNDO_LINK_TO_DIR='rm -f $$1' ;; + *) + CREATE_LINK_TO_DIR='mv $$1 $$2' + UNDO_LINK_TO_DIR='mv $$1 $$2' ;; +esac +AC_SUBST(CREATE_LINK_TO_DIR) +AC_SUBST(UNDO_LINK_TO_DIR) + # Enable -Werror in bootstrap stage2 and later. # Change the default to "no" on release branches. AC_ARG_ENABLE(werror, |