quote call to AC_LANG_CALL

[ofaaland]

Quote a call to AC_LANG_CALL in config/x_ac_check_cond_lib.m4 to quiet an automake warning.

If a call to AC_LANG_SOURCE is not quoted, and the output includes commas, any outer IFELSE will see the wrong set of arguments and produce undesired results.

ACLANG{PROGRAM,CALL} are implemented using AC_LANG_SOURCE, so the same issues applies to them.

Newer versions of automake (automake-1.13.4-3.el7 at least) emit warnings like these if un-quoted calls are detected:

configure.ac:60: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body ../../lib/autoconf/lang.m4:193: AC_LANG_CONFTEST is expanded from... ../../lib/autoconf/general.m4:2661: _AC_LINK_IFELSE is expanded from... ../../lib/autoconf/general.m4:2678: AC_LINK_IFELSE is expanded from... ../../lib/m4sugar/m4sh.m4:639: AS_IF is expanded from... ../../lib/autoconf/general.m4:2031: AC_CACHE_VAL is expanded from... ../../lib/autoconf/general.m4:2052: AC_CACHE_CHECK is expanded from... config/x_ac_check_cond_lib.m4:23: X_AC_CHECK_COND_LIB is expanded from... configure.ac:60: the top level [snip]

Signed-off-by: Olaf Faaland faaland1@llnl.gov

[ofaaland]

Fixes #33 Now that 5 years have passed, we can safely copy the fix from flux: https://github.com/flux-framework/flux-core/issues/3

[ofaaland]

Hi @morrone or @tonyhutter can you take a look at this? Thank you.

[ofaaland]

Cherry-picked to master at aa192d5