doc: document(!) documentation build requirements

The tools we need to build the documentation.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src
index 00b8c3ae..04cf8a87 100644
--- a/doc/nasmdoc.src
+++ b/doc/nasmdoc.src
@@ -8737,8 +8737,9 @@ the \c{git} distributed source control system.  The link is available
 on the website.  This is recommended only to participate in the
 development of NASM or to assist with testing the development code.
 
-To build NASM from the \c{git} repository you will need a Perl and, if
-building on a Unix system, GNU autoconf.
+To build NASM from the \c{git} repository you will need a Perl
+interpreter and, if building on a Unix system, GNU autoconf installed
+on your system.
 
 To build on a Unix system, run:
 
@@ -8746,6 +8747,14 @@ To build on a Unix system, run:
 
 to create the \c{configure} script and then build as listed above.
 
+\H{builddoc} Building the documentation
+
+To build the documentation, you will need a Perl interpreter, a
+Postscript to PDF converter such as Ghostscript, and suitable fonts
+installed on your system. The recommended (and default) fonts are
+Adobe's Source Sans and Source Code fonts, which are freely available
+under the SIL Open Font License.
+
 \A{contact} Contact Information
 
 \H{website} Website