Move macros for finding floating-point exponents into separate M4 files.

[gnulib.git] / gnulib-tool

diff --git a/gnulib-tool b/gnulib-tool
index a644717..7dd2063 100755 (executable)
--- a/gnulib-tool
+++ b/gnulib-tool
@@ -1737,7 +1737,7 @@ func_emit_lib_Makefile_am ()
     echo "AM_CPPFLAGS ="
   fi
   echo
-  if LC_ALL=C grep "^[a-zA-Z0-9_]*_${perhapsLT}LIBRARIES *= *$libname\\.$libext\$" allsnippets.tmp > /dev/null; then
+  if LC_ALL=C grep "^[a-zA-Z0-9_]*_${perhapsLT}LIBRARIES *+\{0,1\}= *$libname\\.$libext\$" allsnippets.tmp > /dev/null; then
     # One of the snippets already specifies an installation location for the
     # library. Don't confuse automake by saying it should not be installed.
     :
@@ -2046,6 +2046,14 @@ func_emit_initmacro_start ()
   # We let automake know about the files to be distributed through the
   # EXTRA_lib_SOURCES variable.
   echo "  m4_pushdef([AC_LIBSOURCES], m4_defn([${macro_prefix_arg}_LIBSOURCES]))"
+  # Create data variables for checking the presence of files that are mentioned
+  # as AC_LIBSOURCES arguments. These are m4 variables, not shell variables,
+  # because we want the check to happen when the configure file is created,
+  # not when it is run. ${macro_prefix_arg}_LIBSOURCES_LIST is the list of
+  # files to check for. ${macro_prefix_arg}_LIBSOURCES_DIR is the subdirectory
+  # in which to expect them.
+  echo "  m4_pushdef([${macro_prefix_arg}_LIBSOURCES_LIST], [])"
+  echo "  m4_pushdef([${macro_prefix_arg}_LIBSOURCES_DIR], [])"
   echo "  gl_COMMON"
 }
 
@@ -2055,6 +2063,23 @@ func_emit_initmacro_start ()
 func_emit_initmacro_end ()
 {
   macro_prefix_arg="$1"
+  # Check the presence of files that are mentioned as AC_LIBSOURCES arguments.
+  # The check is performed only when autoconf is run from the directory where
+  # the configure.ac resides; if it is run from a different directory, the
+  # check is skipped.
+  echo "  m4_ifval(${macro_prefix_arg}_LIBSOURCES_LIST, ["
+  echo "    m4_syscmd([test ! -d ]m4_defn([${macro_prefix_arg}_LIBSOURCES_DIR])[ ||"
+  echo "      for gl_file in ]${macro_prefix_arg}_LIBSOURCES_LIST[ ; do"
+  echo "        if test ! -r ]m4_defn([${macro_prefix_arg}_LIBSOURCES_DIR])[/\$gl_file ; then"
+  echo "          echo \"missing file ]m4_defn([${macro_prefix_arg}_LIBSOURCES_DIR])[/\$gl_file\" >&2"
+  echo "          exit 1"
+  echo "        fi"
+  echo "      done])dnl"
+  echo "      m4_if(m4_sysval, [0], [],"
+  echo "        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])"
+  echo "  ])"
+  echo "  m4_popdef([${macro_prefix_arg}_LIBSOURCES_DIR])"
+  echo "  m4_popdef([${macro_prefix_arg}_LIBSOURCES_LIST])"
   echo "  m4_popdef([AC_LIBSOURCES])"
   echo "  m4_popdef([AC_REPLACE_FUNCS])"
   echo "  m4_popdef([AC_LIBOBJ])"
@@ -2090,13 +2115,6 @@ func_emit_initmacro_done ()
   echo "  ${macro_prefix_arg}_LIBOBJS=\"\$${macro_prefix_arg}_LIBOBJS \$1.\$ac_objext\""
   echo "])"
   echo
-  echo "# m4_foreach_w is provided by autoconf-2.59c and later."
-  echo "# This definition is to accommodate developers using versions"
-  echo "# of autoconf older than that."
-  echo "m4_ifndef([m4_foreach_w],"
-  echo "  [m4_define([m4_foreach_w],"
-  echo "    [m4_foreach([\$1], m4_split(m4_normalize([\$2]), [ ]), [\$3])])])"
-  echo
   echo "# Like AC_REPLACE_FUNCS, except that the module name goes"
   echo "# into ${macro_prefix_arg}_LIBOBJS instead of into LIBOBJS."
   echo "AC_DEFUN([${macro_prefix_arg}_REPLACE_FUNCS], ["
@@ -2111,9 +2129,8 @@ func_emit_initmacro_done ()
   echo "AC_DEFUN([${macro_prefix_arg}_LIBSOURCES], ["
   echo "  m4_foreach([_gl_NAME], [\$1], ["
   echo "    m4_if(_gl_NAME, [alloca.c], [], ["
-  echo "      m4_syscmd([test -r $sourcebase_arg/]_gl_NAME[ || test ! -d $sourcebase_arg])dnl"
-  echo "      m4_if(m4_sysval, [0], [],"
-  echo "        [AC_FATAL([missing $sourcebase_arg/]_gl_NAME)])"
+  echo "      m4_define([${macro_prefix_arg}_LIBSOURCES_DIR], [$sourcebase_arg])"
+  echo "      m4_append([${macro_prefix_arg}_LIBSOURCES_LIST], _gl_NAME, [ ])"
   echo "    ])"
   echo "  ])"
   echo "])"
@@ -2180,6 +2197,12 @@ func_import ()
         s,^.*gl_LOCAL_DIR([[ ]*\([^])]*\).*$,cached_local_gnulib_dir="\1",p
       }
       /gl_MODULES(/ {
+        :a
+          s/)/)/
+          tb
+          N
+          ba
+        :b
         s,^.*gl_MODULES([[ ]*\([^])]*\).*$,cached_specified_modules="\1",p
       }
       /gl_AVOID(/ {
@@ -2987,7 +3010,9 @@ func_import ()
         esac ;;
     esac
     echo "gl_LOCAL_DIR([$relative_local_gnulib_dir])"
-    echo "gl_MODULES(["`echo $specified_modules`"])"
+    echo "gl_MODULES(["
+    echo "$specified_modules" | sed 's/^/  /g'
+    echo "])"
     echo "gl_AVOID([$avoidlist])"
     echo "gl_SOURCE_BASE([$sourcebase])"
     echo "gl_M4_BASE([$m4base])"
@@ -3223,6 +3248,8 @@ func_import ()
     # Update the .cvsignore and .gitignore files.
     { echo "$added_files" | sed -e '/^$/d' -e 's,\([^/]*\)$,|A|\1,'
       echo "$removed_files" | sed -e '/^$/d' -e 's,\([^/]*\)$,|R|\1,'
+      # Treat gnulib-comp.m4 like an added file, even if it already existed.
+      echo "$m4base/|A|gnulib-comp.m4"
     } | LC_ALL=C sort -t'|' -k1,1 > "$tmp"/fileset-changes
     { # Rearrange file descriptors. Needed because "while ... done < ..."
       # constructs are executed in a subshell e.g. by Solaris 10 /bin/sh.
@@ -3384,6 +3411,18 @@ func_import ()
     fi
   fi
   echo "  - mention \"-I ${m4base}\" in ACLOCAL_AMFLAGS in Makefile.am,"
+  {
+    # Find the first parent directory of $m4base that contains a Makefile.am.
+    sed_last='s,^.*/\([^/][^/]*\)//*$,\1/,
+s,//*$,/,'
+    sed_butlast='s,[^/][^/]*//*$,,'
+    dir1="${m4base}/"; dir2=""
+    while test -n "$dir1" && test ! -f "${destdir}/${dir1}Makefile.am"; do
+      dir2=`echo "$dir1" | sed -e "$sed_last"`"$dir2"
+      dir1=`echo "$dir1" | sed -e "$sed_butlast"`
+    done
+    echo "  - mention ${dir2}gnulib-cache.m4 in EXTRA_DIST in ${dir1}Makefile.am."
+  }
   echo "  - invoke ${macro_prefix}_EARLY in $configure_ac, right after AC_PROG_CC,"
   echo "  - invoke ${macro_prefix}_INIT in $configure_ac."
 }