doc: add graphviz imagemagick as build dependencies
authorHeinrich Schuchardt <xypron.glpk@gmx.de>
Sun, 1 Aug 2021 21:29:20 +0000 (23:29 +0200)
committerHeinrich Schuchardt <xypron.glpk@gmx.de>
Sun, 1 Aug 2021 21:31:07 +0000 (23:31 +0200)
commitc0b6f7d4b843a850eb60382e5d664ac6904e707a
tree6e3fa52e8236c04b2656baebfd52f7565c9e2ec7
parent89a5fbbea1e344fb7e43ce4c547fbdf1ae8d81de
doc: add graphviz imagemagick as build dependencies

'make htmldocs' requires graphviz and imagemagick (at least with Sphinx
3.5.4).

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
doc/build/gcc.rst