* John Steele Scott ([email protected]) wrote: > On 13/06/12 17:40, Mathieu Desnoyers wrote: > > * John Steele Scott ([email protected]) wrote: > >> http://lists.lttng.org/pipermail/lttng-dev/2012-May/017927.html > >> > >> I tried to build the latest urcu (git master e51500) on a Centos 6.2 box, > >> and got: > >> > >> jscott@dxi0-62:~/src/userspace-rcu$ make -j4 > >> CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/sh > >> /users/jscott/src/userspace-rcu/config/missing --run aclocal-1.11 -I config > >> CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/sh > >> /users/jscott/src/userspace-rcu/config/missing --run autoconf > >> cd . && /bin/sh /users/jscott/src/userspace-rcu/config/missing --run > >> automake-1.11 --foreign > >> configure:4010: error: possibly undefined macro: m4_ifnblank > >> If this token and others are legitimate, please use m4_pattern_allow. > >> See the Autoconf documentation. > >> make: *** [configure] Error 1 > >> make: *** Waiting for unfinished jobs.... > >> > >> Some digging showed that the macro m4_ifnblank requires autoconf 2.64. > >> Centos 6.2 has autoconf 2.63. :( > >> > >> I just worked around it by reverting commit a767fd locally, then I can > >> build fine. > > Thanks for pointing this out! Can you try the following patch and let me > > know if it fixes your issue ? > > > > > > Mathieu, > > Thanks for your quick response. Unfortunately, with that patch, ./configure > fails like: > [...] > It seems it doesn't like the empty else..fi clause. If I put a command in > there ("true", "echo", whatever), configure completes and I can build > successfully.
Can you try with the following ? I just tested it with autoconf 2.63 here and it seems to work fine now. diff --git a/config/ax_tls.m4 b/config/ax_tls.m4 index 033e3b1..5ab1a41 100644 --- a/config/ax_tls.m4 +++ b/config/ax_tls.m4 @@ -44,7 +44,23 @@ # modified version of the Autoconf Macro, you may extend this special # exception to the GPL to apply to your modified version as well. -#serial 10 +#serial 11 + +# Define m4_ifblank and m4_ifnblank macros from introduced in +# autotools 2.64 m4sugar.m4 if using an earlier autotools. + +ifdef([m4_ifblank], [], [ +m4_define([m4_ifblank], +[m4_if(m4_translit([[$1]], [ ][ ][ +]), [], [$2], [$3])]) +]) + + +ifdef([m4_ifnblank], [], [ +m4_define([m4_ifnblank], +[m4_if(m4_translit([[$1]], [ ][ ][ +]), [], [$3], [$2])]) +]) AC_DEFUN([AX_TLS], [ AC_MSG_CHECKING(for thread local storage (TLS) class) diff --git a/configure.ac b/configure.ac index db34935..5f6bc40 100644 --- a/configure.ac +++ b/configure.ac @@ -28,7 +28,7 @@ AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks c AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.]) AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.]) -AX_TLS([AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $ac_cv_tls)], []) +AX_TLS(AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $ac_cv_tls), [:]) # Checks for programs. AC_PROG_CC -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
