Add new src/c++17 directory to list in acinclude.m4

	* acinclude.m4 (glibcxx_SUBDIRS): Add src/c++17.
	* src/Makefile.am: Add comment.
	* src/c++17/Makefile.in: Regenerate.

From-SVN: r262964

libstdc++-v3/ChangeLog

 2018-07-25  Jonathan Wakely  <jwakely@redhat.com>
 
+	* acinclude.m4 (glibcxx_SUBDIRS): Add src/c++17.
+	* src/Makefile.am: Add comment.
+	* src/c++17/Makefile.in: Regenerate.
+
 	* include/Makefile.am: Add new <bits/unique_lock.h> header.
 	* include/Makefile.in: Regenerate.
 	* include/bits/std_mutex.h [!_GLIBCXX_USE_C99_STDINT_TR1] (mutex)

libstdc++-v3/acinclude.m4

@@ -49,7 +49,7 @@ AC_DEFUN([GLIBCXX_CONFIGURE], [
   # Keep these sync'd with the list in Makefile.am.  The first provides an
   # expandable list at autoconf time; the second provides an expandable list
   # (i.e., shell variable) at configure time.
-  m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/filesystem doc po testsuite python])
+  m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/filesystem doc po testsuite python])
   SUBDIRS='glibcxx_SUBDIRS'
 
   # These need to be absolute paths, yet at the same time need to

libstdc++-v3/src/Makefile.am

@@ -28,6 +28,7 @@ else
 filesystem_dir =
 endif
 
+## Keep this list sync'd with acinclude.m4:GLIBCXX_CONFIGURE.
 SUBDIRS = c++98 c++11 c++17 $(filesystem_dir)
 
 # Cross compiler support.

libstdc++-v3/src/c++17/Makefile.in

@@ -218,7 +218,6 @@ VTV_CXXFLAGS = @VTV_CXXFLAGS@
 VTV_CXXLINKFLAGS = @VTV_CXXLINKFLAGS@
 VTV_PCH_CXXFLAGS = @VTV_PCH_CXXFLAGS@
 WARN_FLAGS = @WARN_FLAGS@
-WERROR = @WERROR@
 XMLLINT = @XMLLINT@
 XSLTPROC = @XSLTPROC@
 XSL_STYLE_DIR = @XSL_STYLE_DIR@
@@ -314,7 +313,7 @@ STAMP = echo timestamp >
 toolexecdir = $(glibcxx_toolexecdir)
 toolexeclibdir = $(glibcxx_toolexeclibdir)
 @ENABLE_WERROR_FALSE@WERROR_FLAG = 
-@ENABLE_WERROR_TRUE@WERROR_FLAG = $(WERROR)
+@ENABLE_WERROR_TRUE@WERROR_FLAG = -Werror
 @ENABLE_EXTERN_TEMPLATE_FALSE@XTEMPLATE_FLAGS = 
 @ENABLE_EXTERN_TEMPLATE_TRUE@XTEMPLATE_FLAGS = -fno-implicit-templates