I think this header was going to be called math_specfun.h but was renamed at the last minute, without re-ordering it in the Makefile.
* include/Makefile.am: Put headers in alphabetical order. * include/Makefile.in: Regenerate. Tested powerpc64le-linux, committed to trunk.
commit a4cac4d8ad8481903f2ad213f7fa692dbe856195 Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Oct 27 18:04:38 2017 +0100 List headers in Makefile in alphabetical order * include/Makefile.am: Put headers in alphabetical order. * include/Makefile.in: Regenerate. diff --git a/libstdc++-v3/include/Makefile.am b/libstdc++-v3/include/Makefile.am index 2c4d193d0a4..3e34dc00747 100644 --- a/libstdc++-v3/include/Makefile.am +++ b/libstdc++-v3/include/Makefile.am @@ -130,7 +130,6 @@ bits_headers = \ ${bits_srcdir}/locale_facets_nonio.tcc \ ${bits_srcdir}/localefwd.h \ ${bits_srcdir}/mask_array.h \ - ${bits_srcdir}/specfun.h \ ${bits_srcdir}/memoryfwd.h \ ${bits_srcdir}/move.h \ ${bits_srcdir}/node_handle.h \ @@ -161,6 +160,7 @@ bits_headers = \ ${bits_srcdir}/shared_ptr_atomic.h \ ${bits_srcdir}/shared_ptr_base.h \ ${bits_srcdir}/slice_array.h \ + ${bits_srcdir}/specfun.h \ ${bits_srcdir}/sstream.tcc \ ${bits_srcdir}/std_abs.h \ ${bits_srcdir}/std_function.h \