libstdc++: Reduce Doxygen output for PDF

Including the header source code in the doxygen-generated PDF file makes
it too large, and causes pdflatex to run out of memory. If we only set
SOURCE_BROWSER=YES for the HTML docs then we won't include the sources
in the PDF file.

There are several macros defined for std::valarray that are only used to
generate repetitive code and then #undef'd. Those aren't useful in the
doxygen docs, especially the ones that reuse the same name in different
files. Omitting them avoids warnings about duplicate labels in the
refman.tex file.

libstdc++-v3/ChangeLog:

	* doc/doxygen/user.cfg.in (SOURCE_BROWSER): Only set to YES for
	HTML docs.
	* include/bits/gslice_array.h (_DEFINE_VALARRAY_OPERATOR): Omit
	from doxygen docs.
	* include/bits/indirect_array.h (_DEFINE_VALARRAY_OPERATOR):
	Likewise.
	* include/bits/mask_array.h (_DEFINE_VALARRAY_OPERATOR):
	Likewise.
	* include/bits/slice_array.h (_DEFINE_VALARRAY_OPERATOR):
	Likewise.
	* include/std/valarray (_DEFINE_VALARRAY_UNARY_OPERATOR)
	(_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT)
	(_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT)
	(_DEFINE_BINARY_OPERATOR): Likewise.

(cherry picked from commit afa69618d1627435841c9164b019ef98000e0365)

6 files changed, 11 insertions, 1 deletions

diff --git a/libstdc++-v3/doc/doxygen/user.cfg.in b/libstdc++-v3/doc/doxygen/user.cfg.in
index eb05c975213..cf8d21c4e5b 100644
--- a/libstdc++-v3/doc/doxygen/user.cfg.in
+++ b/libstdc++-v3/doc/doxygen/user.cfg.in
@@ -1216,7 +1216,7 @@ USE_MDFILE_AS_MAINPAGE =
 # also VERBATIM_HEADERS is set to NO.
 # The default value is: NO.
 
-SOURCE_BROWSER         = YES
+SOURCE_BROWSER         = @do_html@
 
 # Setting the INLINE_SOURCES tag to YES will include the body of functions,
 # classes and enums directly into the documentation.
diff --git a/libstdc++-v3/include/bits/gslice_array.h b/libstdc++-v3/include/bits/gslice_array.h
index 4f3309d842e..f8d11855699 100644
--- a/libstdc++-v3/include/bits/gslice_array.h
+++ b/libstdc++-v3/include/bits/gslice_array.h
@@ -183,6 +183,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 			      _Array<size_t>(_M_index));
       }
 
+  /// @cond undocumented
 #undef _DEFINE_VALARRAY_OPERATOR
 #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)				\
   template<typename _Tp>						\
@@ -214,6 +215,7 @@ _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
 
 #undef _DEFINE_VALARRAY_OPERATOR
+  /// @endcond
 
   /// @} group numeric_arrays
 
diff --git a/libstdc++-v3/include/bits/indirect_array.h b/libstdc++-v3/include/bits/indirect_array.h
index a3dc6059988..bb47855ecea 100644
--- a/libstdc++-v3/include/bits/indirect_array.h
+++ b/libstdc++-v3/include/bits/indirect_array.h
@@ -174,6 +174,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       indirect_array<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e) const
       { std::__valarray_copy(__e, _M_sz, _M_array, _M_index); }
 
+  /// @cond undocumented
 #undef _DEFINE_VALARRAY_OPERATOR
 #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)				\
   template<typename _Tp>						\
@@ -203,6 +204,7 @@ _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
 
 #undef _DEFINE_VALARRAY_OPERATOR
+  /// @endcond
 
   /// @} group numeric_arrays
 
diff --git a/libstdc++-v3/include/bits/mask_array.h b/libstdc++-v3/include/bits/mask_array.h
index 3889bd151a6..fb861dac95b 100644
--- a/libstdc++-v3/include/bits/mask_array.h
+++ b/libstdc++-v3/include/bits/mask_array.h
@@ -174,6 +174,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       mask_array<_Tp>::operator=(const _Expr<_Ex, _Tp>& __e) const
       { std::__valarray_copy(__e, __e.size(), _M_array, _M_mask); }
 
+  /// @cond undocumented
 #undef _DEFINE_VALARRAY_OPERATOR
 #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)				\
   template<typename _Tp>						\
@@ -204,6 +205,7 @@ _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
 
 #undef _DEFINE_VALARRAY_OPERATOR
+  /// @endcond
 
   /// @} group numeric_arrays
 
diff --git a/libstdc++-v3/include/bits/slice_array.h b/libstdc++-v3/include/bits/slice_array.h
index bdced19e789..1990a1cddb4 100644
--- a/libstdc++-v3/include/bits/slice_array.h
+++ b/libstdc++-v3/include/bits/slice_array.h
@@ -245,6 +245,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     slice_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
     { std::__valarray_copy(__e, _M_sz, _M_array, _M_stride); }
 
+  /// @cond undocumented
 #undef _DEFINE_VALARRAY_OPERATOR
 #define _DEFINE_VALARRAY_OPERATOR(_Op,_Name)				\
   template<typename _Tp>						\
@@ -275,6 +276,7 @@ _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
 
 #undef _DEFINE_VALARRAY_OPERATOR
+  /// @endcond
 
   /// @} group numeric_arrays
 
diff --git a/libstdc++-v3/include/std/valarray b/libstdc++-v3/include/std/valarray
index 72eb7a9d56d..458c7cd7811 100644
--- a/libstdc++-v3/include/std/valarray
+++ b/libstdc++-v3/include/std/valarray
@@ -1076,6 +1076,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       return _Expr<_Closure, _Tp>(_Closure(*this, func));
     }
 
+  /// @cond undocumented
 #define _DEFINE_VALARRAY_UNARY_OPERATOR(_Op, _Name)                     \
   template<typename _Tp>						\
     inline typename valarray<_Tp>::template _UnaryOp<_Name>::_Rt	\
@@ -1202,6 +1203,7 @@ _DEFINE_BINARY_OPERATOR(<=, __less_equal)
 _DEFINE_BINARY_OPERATOR(>=, __greater_equal)
 
 #undef _DEFINE_BINARY_OPERATOR
+  /// @endcond
 
 #if __cplusplus >= 201103L
   /**