Use system install program when available and usable

In a3176dac22 we switched to using
install-sh unconditionally, because the configure check
AC_PROG_INSTALL would pick up any random program named install, which
has caused failure reports
(http://archives.postgresql.org/pgsql-hackers/2001-03/msg00312.php).
Now the configure check is much improved and should avoid false
positives.  It has also been shown that using a system install program
can significantly reduce "make install" times, so it's worth trying.

configure

@@ -693,6 +693,9 @@ MKDIR_P
 AWK
 LN_S
 TAR
+INSTALL_DATA
+INSTALL_SCRIPT
+INSTALL_PROGRAM
 WINDRES
 DLLWRAP
 DLLTOOL
@@ -6855,6 +6858,106 @@ fi
 
 fi
 
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ $as_echo "$as_me:$LINENO: checking for a BSD-compatible install" >&5
+$as_echo_n "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if test "${ac_cv_path_install+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in
+  ./ | .// | /cC/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:\\/os2\\/install\\/* | ?:\\/OS2\\/INSTALL\\/* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if { test -f "$as_dir/$ac_prog$ac_exec_ext" && $as_test_x "$as_dir/$ac_prog$ac_exec_ext"; }; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    rm -rf conftest.one conftest.two conftest.dir
+	    echo one > conftest.one
+	    echo two > conftest.two
+	    mkdir conftest.dir
+	    if "$as_dir/$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir" &&
+	      test -s conftest.one && test -s conftest.two &&
+	      test -s conftest.dir/conftest.one &&
+	      test -s conftest.dir/conftest.two
+	    then
+	      ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+	      break 3
+	    fi
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+
+done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    INSTALL=$ac_install_sh
+  fi
+fi
+{ $as_echo "$as_me:$LINENO: result: $INSTALL" >&5
+$as_echo "$INSTALL" >&6; }
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+# When Autoconf chooses install-sh as install program it tries to generate
+# a relative path to it in each makefile where it subsitutes it. This clashes
+# with our Makefile.global concept. This workaround helps.
+case $INSTALL in
+  *install-sh*) INSTALL='';;
+esac
+
 # Extract the first word of "tar", so it can be a program name with args.
 set dummy tar; ac_word=$2
 { $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
@@ -30284,6 +30387,7 @@ gives unlimited permission to copy, distribute and modify it."
 
 ac_pwd='$ac_pwd'
 srcdir='$srcdir'
+INSTALL='$INSTALL'
 MKDIR_P='$MKDIR_P'
 AWK='$AWK'
 test -n "\$AWK" || AWK=awk
@@ -30897,6 +31001,10 @@ ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
   # CONFIG_FILE
   #
 
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
+  esac
   ac_MKDIR_P=$MKDIR_P
   case $MKDIR_P in
   [\\/$]* | ?:[\\/]* ) ;;
@@ -30957,6 +31065,7 @@ s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
 s&@builddir@&$ac_builddir&;t t
 s&@abs_builddir@&$ac_abs_builddir&;t t
 s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+s&@INSTALL@&$ac_INSTALL&;t t
 s&@MKDIR_P@&$ac_MKDIR_P&;t t
 $ac_datarootdir_hack
 "

configure.in

@@ -809,6 +809,14 @@ if test "$PORTNAME" = "win32"; then
   AC_CHECK_TOOL(WINDRES, windres, windres)
 fi
 
+AC_PROG_INSTALL
+# When Autoconf chooses install-sh as install program it tries to generate
+# a relative path to it in each makefile where it subsitutes it. This clashes
+# with our Makefile.global concept. This workaround helps.
+case $INSTALL in
+  *install-sh*) INSTALL='';;
+esac
+
 AC_PATH_PROG(TAR, tar)
 AC_PROG_LN_S
 AC_PROG_AWK

src/Makefile.global.in

@@ -289,7 +289,8 @@ BZIP2	= bzip2
 
 # Installation.
 
-INSTALL	= $(SHELL) $(top_srcdir)/config/install-sh -c
+install_sh = $(SHELL) $(top_srcdir)/config/install-sh -c
+INSTALL = $(if $(use_install_sh),$(install_sh),$(or @INSTALL@,$(install_sh)))
 
 INSTALL_SCRIPT_MODE	= 755
 INSTALL_DATA_MODE	= 644
@@ -561,7 +562,10 @@ endif # not PGXS
 
 
 install-strip:
-	@$(MAKE) INSTALL_PROGRAM_ENV="STRIPPROG='$(STRIP)'" \
+# install-strip always uses install-sh, so that strip options can be
+# passed.
+	$(MAKE) use_install_sh=yes \
+	    INSTALL_PROGRAM_ENV="STRIPPROG='$(STRIP)'" \
 	    INSTALL_STLIB_ENV="STRIPPROG='$(STRIP_STATIC_LIB)'" \
 	    INSTALL_SHLIB_ENV="STRIPPROG='$(STRIP_SHARED_LIB)'" \
 	    INSTALL_STRIP_FLAG=-s \