contrib: Set more site.exp variables in test_installed

Add support in contrib/test_installed for more variables (via
associated command-line options to the script) that gcc/Makefile.in
can set:

* ALT_CC_UNDER_TEST, ALT_CXX_UNDER_TEST and COMPAT_OPTIONS are used in
  compat testing (against the same or a different compiler).

* The libiconv variable is used for testing iconv support for
  particular character sets, and defaults to -liconv if not set in
  site.exp, which is wrong on systems with iconv in libc; keep the
  default, but add an option to override this.

  Note that the dg-require-iconv testing is currently bogus in a cross
  environment, and this patch does nothing to address that.  The tests
  using dg-require-iconv actually care about character set support on
  the *host*, for character conversions carried out in the compiler,
  and the libiconv setting put in site.exp by gcc/Makefile.in is a
  *host* library setting.  But dg-require-iconv /
  check_iconv_available tests availability when compiling, linking and
  executing for the *target*.  If the host and target have close
  enough to the same OS, this may work by accident, but otherwise it
  will incorrectly enable / disable these tests based on target
  information (but using a libiconv setting designed for the host)
  when it should be based on host information.

	* test_installed (--with-alt-cc=, --with-alt-cxx=)
	(--with-compat-options=, --with-libiconv=): New options.

1 files changed, 19 insertions, 0 deletions

diff --git a/contrib/test_installed b/contrib/test_installed
index 77492ca..42c3f12 100755
--- a/contrib/test_installed
+++ b/contrib/test_installed
@@ -42,6 +42,7 @@ if test -f site.exp; then
     exit 1
 fi
 
+libiconv=-liconv
 while true; do
   case "$1" in
   --with-testsuite=*) testsuite=`echo "$1" | sed 's/[^=]*=//'`; shift;;
@@ -51,6 +52,10 @@ while true; do
   --with-gcc=*) GCC_UNDER_TEST=`echo "$1" | sed 's/[^=]*=//'`; shift;;
   --with-g++=*) GXX_UNDER_TEST=`echo "$1" | sed 's/[^=]*=//'`; shift;;
   --with-gfortran=*) GFORTRAN_UNDER_TEST=`echo "$1" | sed 's/[^=]*=//'`; shift;;
+  --with-alt-cc=*) ALT_CC_UNDER_TEST=`echo "$1" | sed 's/[^=]*=//'`; shift;;
+  --with-alt-cxx=*) ALT_CXX_UNDER_TEST=`echo "$1" | sed 's/[^=]*=//'`; shift;;
+  --with-compat-options=*) COMPAT_OPTIONS=`echo "$1" | sed 's/[^=]*=//'`; shift;;
+  --with-libiconv=*) libiconv=`echo "$1" | sed 's/[^=]*=//'`; shift;;
   --without-gcc) GCC_UNDER_TEST=no; shift;;
   --without-g++) GXX_UNDER_TEST=no; shift;;
   --without-gfortran) GFORTRAN_UNDER_TEST=no; shift;;
@@ -78,6 +83,10 @@ Supported arguments:
 --with-gcc=/some/dir/bin/gcc  use specified gcc program [gcc]
 --with-g++=/some/dir/bin/g++  use specified g++ program [g++]
 --with-gfortran=/some/dir/bin/gfortran  use specified gfortran program [gfortran]
+--with-alt-cc=/some/compiler  use specified alternative compiler in compat tests
+--with-alt-cxx=/some/compiler use specified alternative compiler in compat tests
+--with-compat-options=opts    use specified COMPAT_OPTIONS in compat tests
+--with-libiconv=linker-args   use given arguments to link with iconv [-liconv]
 --without-gcc                 do not run gcc testsuite
 --without-g++                 do not run g++ testsuite
 --without-gfortran            do not run gfortran testsuite
@@ -108,6 +117,7 @@ cat >site.exp <<EOF
 set rootme "."
 set tmpdir "${tmpdir-`${PWDCMD-pwd}`}"
 set srcdir "${testsuite-${srcdir}/gcc/testsuite}"
+set libiconv "$libiconv"
 set CFLAGS ""
 set CXXFLAGS ""
 set GCC_UNDER_TEST "${GCC_UNDER_TEST-${prefix}${prefix+/bin/}gcc}"
@@ -123,6 +133,15 @@ if test x${target} != x; then
   echo "set target_triplet $target" >> site.exp
   echo "set target_alias $target" >> site.exp
 fi
+if test x"$ALT_CC_UNDER_TEST" != x; then
+  echo "set ALT_CC_UNDER_TEST \"${ALT_CC_UNDER_TEST}\"" >> site.exp
+fi
+if test x"$ALT_CXX_UNDER_TEST" != x; then
+  echo "set ALT_CXX_UNDER_TEST \"${ALT_CXX_UNDER_TEST}\"" >> site.exp
+fi
+if test x"$COMPAT_OPTIONS" != x; then
+  echo "set COMPAT_OPTIONS \"${COMPAT_OPTIONS}\"" >> site.exp
+fi
 
 test x"${GCC_UNDER_TEST}" = x"no" || runtest --tool gcc ${1+"$@"}
 test x"${GXX_UNDER_TEST}" = x"no" || runtest --tool g++ ${1+"$@"}