URL: https://github.com/freeipa/freeipa/pull/718 Title: #718: configure: fix AC_CHECK_LIB usage
lslebodn commented: """ >It does not explicitly say what constitutes an unspecified value though. ```[]``` means default action. BTW it is not peculiar behaviour because most project define custom LIBS using the 3rd argument and not after invocation of macro. e.g. ``` AC_CHECK_HEADER(krad.h, [], [AC_MSG_ERROR([krad.h not found])]) -AC_CHECK_LIB(krad, main, [], [AC_MSG_ERROR([libkrad not found])]) +AC_CHECK_LIB(krad, main, [KRAD_LIBS="-lkrad"], [AC_MSG_ERROR([libkrad not found])]) -KRAD_LIBS="-lkrad" ``` And link to online documentation https://www.gnu.org/software/autoconf/manual/autoconf.html#Libraries """ See the full comment at https://github.com/freeipa/freeipa/pull/718#issuecomment-294844095
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