X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=link.sh;fp=link.sh;h=3519d42dba953a3965274bfac0ceee4ae3af5b52;hp=0000000000000000000000000000000000000000;hb=14df8308778d04b49582a29d7a2866c7dbb9ccf9;hpb=70d5336ba77f51e7c12c1f0c52179770d636cc08

diff --git a/link.sh b/link.sh
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+#!/bin/sh
+
+#
+# Yoink
+# Execute this file to link the executable with fewer direct dependencies.
+#
+# You shouldn't call this directly; instead, use the configure script's
+# --enable-link-sh option and run make normally.  This isn't enabled by
+# default because there is the potential for runtime linking problems.  If
+# you have a newer version of GCC, you should prefer the --as-needed linker
+# flag over this method, though they both should accomplish the same thing.
+#
+
+# link.sh -- try linking Vim with different sets of libraries, finding the
+# minimal set for fastest startup.  The problem is that configure adds a few
+# libraries when they exist, but this doesn't mean they are needed for Vim.
+#
+#      Author: Bram Moolenaar
+# Last change: 2006 Sep 26
+#     License: Public domain
+#
+# Warning: This fails miserably if the linker doesn't return an error code!
+#
+# Otherwise this script is fail-safe, falling back to the original full link
+# command if anything fails.
+
+echo "$LINK " >link.cmd
+exit_value=0
+
+#
+# If .link/link.sed already exists, use it.  We assume a previous run of
+# link.sh has found the correct set of libraries.
+#
+if test -f .link/link.sed; then
+  echo "link.sh: The file '.link/link.sed' exists, which is going to be used now."
+  echo "link.sh: If linking fails, try deleting the .link/link.sed file."
+  echo "link.sh: If this fails too, try creating an empty .link/link.sed file."
+else
+
+# If linking works with the full link command, try removing some libraries,
+# that are known not to be needed on at least one system.
+# Remove .link/pathdef.c if there is a new link command and compile it again.
+# There is a loop to remove libraries that appear several times.
+#
+# Notes:
+# - Can't remove Xext; It links fine but will give an error when running gvim
+#   with Motif.
+# - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
+#   GUI is started, because the "floor" symbol could not be resolved.
+#
+  cat link.cmd
+  if sh link.cmd; then
+    mkdir -p .link
+    touch .link/link.sed
+    cp link.cmd linkit.sh
+    for libname in atk-1.0 cairo fontconfig freetype gdk-x11-2.0 gio-2.0 glib-2.0 gmodule-2.0 ogg pango-1.0 pangocairo-1.0 pangoft2-1.0 vorbis; do
+      cont=yes
+      while test -n "$cont"; do
+        if grep "l$libname " linkit.sh >/dev/null; then
+          if test ! -f link1.sed; then
+            echo "link.sh: OK, linking works, let's try removing a few libraries."
+            echo "link.sh: See .link/link.log for details."
+            rm -f .link/link.log
+          fi
+          echo "s/-l$libname  *//" >link1.sed
+          sed -f .link/link.sed <link.cmd >linkit2.sh
+          sed -f link1.sed <linkit2.sh >linkit.sh
+          # keep the last -lm
+          if test $libname != "m" || grep "lm " linkit.sh >/dev/null; then
+            echo "link.sh: Trying to remove the $libname library..."
+            cat linkit.sh >>.link/link.log
+            # Redirect this link output, it may contain error messages which
+            # should be ignored.
+            if sh linkit.sh >>.link/link.log 2>&1; then
+              echo "link.sh: We don't need the $libname library!"
+              cat link1.sed >>.link/link.sed
+            else
+              echo "link.sh: We DO need the $libname library."
+              cont=
+              cp link.cmd linkit.sh
+            fi
+          else
+            cont=
+            cp link.cmd linkit.sh
+          fi
+        else
+          cont=
+          cp link.cmd linkit.sh
+        fi
+      done
+    done
+    if test ! -f link1.sed; then
+      echo "link.sh: Linked fine, no libraries can be removed"
+      touch link3.sed
+    fi
+  else
+    exit_value=$?
+  fi
+fi
+
+#
+# Now do the real linking.
+#
+if test -s .link/link.sed; then
+  echo "link.sh: Using .link/link.sed file to remove a few libraries"
+  sed -f .link/link.sed <link.cmd >linkit.sh
+  cat linkit.sh
+  if sh linkit.sh; then
+    exit_value=0
+    echo "link.sh: Linked fine with a few libraries removed"
+  else
+    exit_value=$?
+    echo "link.sh: Linking failed, making .link/link.sed empty and trying again"
+    mv -f .link/link.sed link2.sed
+    touch .link/link.sed
+  fi
+fi
+if test -f .link/link.sed -a ! -s .link/link.sed -a ! -f link3.sed; then
+  echo "link.sh: Using unmodified link command"
+  cat link.cmd
+  if sh link.cmd; then
+    exit_value=0
+    echo "link.sh: Linked OK"
+  else
+    exit_value=$?
+    if test -f link2.sed; then
+      echo "link.sh: Linking doesn't work at all, removing .link/link.sed"
+      rm -f .link/link.sed
+    fi
+  fi
+fi
+
+#
+# cleanup
+#
+rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh
+
+#
+# return an error code if something went wrong
+#
+exit $exit_value
+