m4 ChangeLog NEWS configure.ac checks/check-the... [branch-1_4]

[Eric Blake]

CVSROOT:        /sources/m4
Module name:    m4
Branch:         branch-1_4
Changes by:     Eric Blake <ericb>      06/06/30 18:58:12

Modified files:
        .              : ChangeLog NEWS configure.ac 
        checks         : check-them 
        doc            : m4.texinfo 
        src            : builtin.c debug.c 

Log message:
        For compatibility with other m4 implementations, sysval returns
        signal<<8 rather than 0 if syscmd is terminated by a signal.
        * configure.ac (AC_CHECK_HEADERS_ONCE): Check for sys/wait.h.
        * src/builtin.c (include): Include sys/wait.h when stdlib.h does
        not provide wait macros.
        (WTERMSIG, WIFSIGNALED, WIFEXITED): More fallback macros.
        (M4SYSVAL_EXITBITS, M4SYSVAL_TERMSIGBITS): New helper macros.
        (m4_esyscmd): Set sysval to -1 on failure.
        (m4_sysval): Print 127 on failure, and accomodate signals if they
        are detectable.
        * NEWS: Document this change.
        * doc/m4.texinfo (Platform macros, Esyscmd, Sysval): Fix typos in
        last commit.
        * checks/check-them: Likewise.
        * src/debug.c (debug_set_file): Work around mingw fstat bug.

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/m4/ChangeLog?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.91&r2=1.1.1.1.2.92
http://cvs.savannah.gnu.org/viewcvs/m4/NEWS?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.28&r2=1.1.1.1.2.29
http://cvs.savannah.gnu.org/viewcvs/m4/configure.ac?cvsroot=m4&only_with_tag=branch-1_4&r1=1.36.2.19&r2=1.36.2.20
http://cvs.savannah.gnu.org/viewcvs/m4/checks/check-them?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.3&r2=1.1.1.1.2.4
http://cvs.savannah.gnu.org/viewcvs/m4/doc/m4.texinfo?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.28&r2=1.1.1.1.2.29
http://cvs.savannah.gnu.org/viewcvs/m4/src/builtin.c?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.15&r2=1.1.1.1.2.16
http://cvs.savannah.gnu.org/viewcvs/m4/src/debug.c?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.3&r2=1.1.1.1.2.4