Add --with-static-standard-libraries to the top level

gdb should normally not be linked with -static-libstdc++.  Currently
this has not caused problems, but it's incompatible with catching an
exception thrown from a shared library -- and a subsequent patch
changes gdb to do just this.

This patch adds a new --with-static-standard-libraries flag to the
top-level configure.  It defaults to "auto", which means enabled if
gcc is being built, and disabled otherwise.

ChangeLog
2019-08-19  Tom Tromey  <tom@tromey.com>

	* configure: Rebuild.
	* configure.ac: Add --with-static-standard-libraries.

From-SVN: r274673

ChangeLog

@@ -1,3 +1,8 @@
+2019-08-19  Tom Tromey  <tom@tromey.com>
+
+	* configure: Rebuild.
+	* configure.ac: Add --with-static-standard-libraries.
+
 2019-08-16  Alexandre Oliva <oliva@gnu.org>
 
 	* MAINTAINERS: aoliva from @redhat.com to @gcc.gnu.org.

configure

@@ -806,6 +806,7 @@ with_gmp
 with_gmp_include
 with_gmp_lib
 with_stage1_libs
+with_static_standard_libraries
 with_stage1_ldflags
 with_boot_libs
 with_boot_ldflags
@@ -1579,6 +1580,9 @@ Optional Packages:
   --with-gmp-include=PATH specify directory for installed GMP include files
   --with-gmp-lib=PATH     specify directory for the installed GMP library
   --with-stage1-libs=LIBS libraries for stage1
+  --with-static-standard-libraries
+                          use -static-libstdc++ and -static-libgcc
+                          (default=auto)
   --with-stage1-ldflags=FLAGS
                           linker flags for stage1
   --with-boot-libs=LIBS   libraries for stage2 and later
@@ -5877,6 +5881,23 @@ fi
 
 
 
+# Whether or not to use -static-libstdc++ and -static-libgcc.  The
+# default is yes if gcc is being built; no otherwise.  The reason for
+# this default is that gdb is sometimes linked against GNU Source
+# Highlight, which is a shared library that uses C++ exceptions.  In
+# this case, -static-libstdc++ will cause crashes.
+
+# Check whether --with-static-standard-libraries was given.
+if test "${with_static_standard_libraries+set}" = set; then :
+  withval=$with_static_standard_libraries;
+else
+  with_static_standard_libraries=auto
+fi
+
+if test "$with_static_standard_libraries" = auto; then
+  with_static_standard_libraries=$have_compiler
+fi
+
 # Linker flags to use for stage1 or when not bootstrapping.
 
 # Check whether --with-stage1-ldflags was given.
@@ -5891,7 +5912,8 @@ else
  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
  # if supported.  But if the user explicitly specified the libraries to use,
  # trust that they are doing what they want.
- if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
+ if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
+     -a "$have_static_libs" = yes; then
    stage1_ldflags="-static-libstdc++ -static-libgcc"
  fi
 fi

configure.ac

@@ -1640,6 +1640,19 @@ AC_ARG_WITH(stage1-libs,
 [stage1_libs=])
 AC_SUBST(stage1_libs)
 
+# Whether or not to use -static-libstdc++ and -static-libgcc.  The
+# default is yes if gcc is being built; no otherwise.  The reason for
+# this default is that gdb is sometimes linked against GNU Source
+# Highlight, which is a shared library that uses C++ exceptions.  In
+# this case, -static-libstdc++ will cause crashes.
+AC_ARG_WITH(static-standard-libraries,
+[AS_HELP_STRING([--with-static-standard-libraries],
+                [use -static-libstdc++ and -static-libgcc (default=auto)])],
+[], [with_static_standard_libraries=auto])
+if test "$with_static_standard_libraries" = auto; then
+  with_static_standard_libraries=$have_compiler
+fi
+
 # Linker flags to use for stage1 or when not bootstrapping.
 AC_ARG_WITH(stage1-ldflags,
 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
@@ -1652,7 +1665,8 @@ AC_ARG_WITH(stage1-ldflags,
  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
  # if supported.  But if the user explicitly specified the libraries to use,
  # trust that they are doing what they want.
- if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
+ if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
+     -a "$have_static_libs" = yes; then
    stage1_ldflags="-static-libstdc++ -static-libgcc"
  fi])
 AC_SUBST(stage1_ldflags)