Add --with-nonshared-cflags option to configure

1 files changed, 14 insertions, 0 deletions

diff --git a/manual/install.texi b/manual/install.texi
index df32b39..eab4b0d 100644
--- a/manual/install.texi
+++ b/manual/install.texi
@@ -117,6 +117,20 @@ problem and suppress these constructs, so that the library will still be
 usable, but functionality may be lost---for example, you can't build a
 shared libc with old binutils.
 
+@item --with-nonshared-cflags=@var{cflags}
+Use additional compiler flags @var{cflags} to build the parts of the
+library which are always statically linked into applications and
+libraries even with shared linking (that is, the object files contained
+in @file{lib*_nonshared.a} libraries).  The build process will
+automatically use the appropriate flags, but this option can be used to
+set additional flags required for building applications and libraries,
+to match local policy.  For example, if such a policy requires that all
+code linked into applications must be built with source fortification,
+@samp{--with-nonshared-cflags=-Wp,-D_FORTIFY_SOURCE=2} will make sure
+that the objects in @file{libc_nonshared.a} are compiled with this flag
+(although this will not affect the generated code in this particular
+case and potentially change debugging information and metadata only).
+
 @c disable static doesn't work currently
 @c @item --disable-static
 @c Don't build static libraries.  Static libraries aren't that useful these