X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=README;h=784be277fc6f28e488873473cc09a563f87b6153;hp=705f4eb2af835caefbef8293651945e854844435;hb=25d3576134e7b57ca169e8e4ebd4e4ce5dcf62dd;hpb=d5a4209da3f3dc35bb3f262818a46c19b524c711

diff --git a/README b/README
index 705f4eb..784be27 100644
--- a/README
+++ b/README
@@ -27,15 +27,18 @@ Distro packagers should only use released tarballs (no git snapshots).
 Requirements
 ------------
 
- - git
- - gcc (>= 4.0)
+ - git (only needed when building from git)
+ - gcc (>= 4.0) or clang
  - make
- - autoconf >= 2.63
- - automake >= 1.11
- - libtool
+ - autoconf >= 2.63 (only needed when building from git)
+ - automake >= 1.11 (only needed when building from git)
+ - libtool (only needed when building from git)
  - pkg-config >= 0.22
- - libglib >= 2.24.0
- - Python >= 3.0
+ - libglib >= 2.34
+ - Python >= 3.2
+ - check >= 0.9.4 (optional, only needed to run unit tests)
+ - doxygen (optional, only needed for the C API docs)
+ - graphviz (optional, only needed for the C API docs)
 
 
 Building and installing
@@ -58,13 +61,31 @@ See INSTALL or the following wiki page for more (OS-specific) instructions:
  http://sigrok.org/wiki/Building
 
 
-Mailing lists
--------------
+Copyright and license
+---------------------
 
-There are two mailing lists for sigrok/libsigrokdecode:
+libsigrokdecode is licensed under the terms of the GNU General Public License
+(GPL), version 3 or later.
+
+The protocol decoders (PDs) included in libsigrokdecode are an integral part
+of the shared library (they are not merely external "plugins", they are not
+external programs that libsigrokdecode calls via fork/exec, they cannot
+function standalone without libsigrokdecode at all, the PDs and the rest of
+the libsigrokdecode codebase share data structures and make function calls
+to each other). Thus, since the PDs are part of the library, they are also
+licensed under the terms of the GPLv3+.
+
+While some individual source code files are licensed under the GPLv2+, and
+some files are licensed under the GPLv3+, this doesn't change the fact that
+the library as a whole is licensed under the terms of the GPLv3+.
+
+Please see the individual source files for the full list of copyright holders.
+
+
+Mailing list
+------------
 
  https://lists.sourceforge.net/lists/listinfo/sigrok-devel
- https://lists.sourceforge.net/lists/listinfo/sigrok-commits
 
 
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