output/csv: use intermediate time_t var, silence compiler warning

[libsigrok.git] / m4 / sigrok.m4

diff --git a/m4/sigrok.m4 b/m4/sigrok.m4
index 432b6a608e2f4e968daa42ce7c760b7bfdce9c79..5dc296090623b85c6ab1bbed484f8c448f582d53 100644 (file)
--- a/m4/sigrok.m4
+++ b/m4/sigrok.m4
@@ -18,7 +18,7 @@
 ## along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ##
 
-#serial 20150825
+#serial 20150910
 
 ## SR_APPEND(var-name, [list-sep,] element)
 ##
@@ -52,34 +52,48 @@ m4_define([_SR_PKG_VERSION_SET],
 [dnl
 m4_assert([$# >= 6])[]dnl
 $1=$4
+dnl Check if we can get version control details. Re-configure when
+dnl branches change (when HEAD starts pointing somewhere else).
+dnl Track individual revisions at compile time, and only as a local
+dnl dependency of just a part of the library build. In other words:
+dnl Don't re-configure and re-build everything just because a commit
+dnl happened). Checks for tagged sources also happen at compile time.
 sr_git_deps=
-# Check if we can get revision information from git.
 sr_head=`git -C "$srcdir" rev-parse --verify --short HEAD 2>&AS_MESSAGE_LOG_FD`
-
-AS_IF([test "$?" = 0 && test "x$sr_head" != x], [dnl
-       test ! -f "$srcdir/.git/HEAD" \
-               || sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/HEAD"
-
+AS_IF([test "$?" = 0 && test -n "$sr_head"], [dnl
+       test ! -f "$srcdir/.git/HEAD" || \
+               sr_git_deps="$sr_git_deps ${ac_abs_confdir}/.git/HEAD"
        sr_head_name=`git -C "$srcdir" rev-parse --symbolic-full-name HEAD 2>&AS_MESSAGE_LOG_FD`
-       AS_IF([test "$?" = 0 && test -f "$srcdir/.git/$sr_head_name"],
-               [sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/$sr_head_name"])
-
-       # Append the revision hash unless we are exactly on a tagged release.
-       git -C "$srcdir" describe --match "$3$4" \
-               --exact-match >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD \
-               || $1="[$]$1-git-$sr_head"
+       AS_IF([test "$?" = 0 && test -f "$srcdir/.git/$sr_head_name"], [dnl
+               sr_head_file="${ac_abs_confdir}/.git/$sr_head_name"
+               AC_SUBST(VERSION_HEAD_FILE, [$sr_head_file])
+       ])
+       sr_hash=`git -C "$srcdir" describe --match "$3$4" --always --dirty`
+       sr_hash=`echo "$sr_hash" | sed 's/$3$4-//'` && \
+       $1_STRING_SUFFIX=`git -C "$srcdir" describe --match "$3$4" --exact-match > /dev/null 2> /dev/null || echo "-$sr_hash"`
+       AS_IF([test -n "$1_STRING_SUFFIX"], [$1="[$]$1-git"])
 ])
-# Use $(wildcard) so that things do not break if for whatever
-# reason these files do not exist anymore at make time.
+AM_CONDITIONAL([VCS_IS_GIT], [test -n "$sr_git_deps"])
+# Use $(wildcard) so that things do not break if for whatever reason
+# these files do not exist anymore at make time.
 AS_IF([test -n "$sr_git_deps"],
-       [SR_APPEND([CONFIG_STATUS_DEPENDENCIES], ["\$(wildcard$sr_git_deps)"])])
+       [SR_APPEND([CONFIG_STATUS_DEPENDENCIES], ["\$(wildcard $sr_git_deps)"])])
 AC_SUBST([CONFIG_STATUS_DEPENDENCIES])[]dnl
+AS_IF([test -n "$sr_git_deps$sr_head_file"],
+       [SR_APPEND([VERSION_GITVERSION_DEPS], ["\$(wildcard $sr_git_deps $sr_head_file)"])])
+AC_SUBST(VERSION_GITVERSION_DEPS)[]dnl
+AC_SUBST(VERSION_SOURCE_DIR, [${ac_abs_confdir}])
+AC_SUBST(VERSION_TAG_PREFIX, [$3])[]dnl
+AC_SUBST(VERSION_TAG_NUMBER, [$4])[]dnl
+AC_SUBST(VERSION_TAG_MATCH, [$3$4])[]dnl
+dnl End of git version control details gathering.
+dnl
 AC_SUBST([$1])[]dnl
 dnl
 AC_DEFINE([$1_MAJOR], [$5], [Major version number of $2.])[]dnl
 AC_DEFINE([$1_MINOR], [$6], [Minor version number of $2.])[]dnl
 m4_ifval([$7], [AC_DEFINE([$1_MICRO], [$7], [Micro version number of $2.])])[]dnl
-AC_DEFINE_UNQUOTED([$1_STRING], ["[$]$1"], [Version of $2.])[]dnl
+AC_DEFINE_UNQUOTED([$1_STRING_PREFIX], ["[$]$1"], [Version of $2.])[]dnl
 ])
 
 ## SR_PKG_VERSION_SET(var-prefix, version-triple)
@@ -319,26 +333,17 @@ _SR_ARG_OPT_PKG(m4_defn([_SR_VAR_OPT_PKG_FEATURES]),
        m4_shift3($@))[]dnl
 ])
 
-## SR_PROG_MAKE_NO_PRINT_DIRECTORY
+## SR_PROG_VERSION(program, sh-var)
 ##
-## Check whether the make program supports the --no-print-directory flag.
-## If so, add it to AM_MAKEFLAGS.
+## Obtain the version of <program> and store it in <sh-var>.
 ##
-AC_DEFUN([SR_PROG_MAKE_NO_PRINT_DIRECTORY],
+AC_DEFUN([SR_PROG_VERSION],
 [dnl
-AC_CACHE_CHECK([whether [$]{MAKE:-make} supports --no-print-directory],
-       [sr_cv_prog_make_no_print_dir], [
-cat >conftest.mk <<'_SREOF'
-all: ; @:
-.PHONY: all
-_SREOF
-AS_IF([[$]{MAKE:-make} -f conftest.mk --no-print-directory >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD],
-       [sr_cv_prog_make_no_print_dir=yes], [sr_cv_prog_make_no_print_dir=no])
-rm -f conftest.mk
-])
-AS_IF([test "x$sr_cv_prog_make_no_print_dir" = xyes],
-       [SR_APPEND([AM_MAKEFLAGS], [--no-print-directory])])
-AC_SUBST([AM_MAKEFLAGS])
+m4_assert([$# >= 2])[]dnl
+sr_prog_ver=`$1 --version 2>&AS_MESSAGE_LOG_FD | sed 1q 2>&AS_MESSAGE_LOG_FD`
+AS_CASE([[$]?:$sr_prog_ver],
+       [[0:*[0-9].[0-9]*]], [$2=$sr_prog_ver],
+       [$2=unknown])[]dnl
 ])
 
 ## SR_PROG_MAKE_ORDER_ONLY
@@ -362,6 +367,7 @@ rm -f conftest.mk
 ])
 AS_IF([test "x$sr_cv_prog_make_order_only" = xyes], [ORDER='|'], [ORDER=])
 AC_SUBST([ORDER])
+AM_SUBST_NOTMAKE([ORDER])[]dnl
 ])
 
 ## SR_CHECK_COMPILE_FLAGS(flags-var, description, flags)