Hexagon (meson.build): define min bison version

Hexagon's idef-parser machinery uses some bison features that are not
available at older versions. The most preeminent example (as it can
be used as a sentinel) is "%define parse.error verbose". This was
introduced in version 3.0 of the tool, which is able to compile
qemu-hexagon just fine. However, compilation fails with the previous
minor bison release, v2.7. So let's assert the minimum version at
meson.build to give a more comprehensive error message for those trying
to compile QEMU.

[1]: https://www.gnu.org/software/bison/manual/html_node/_0025define-Summary.html#index-_0025define-parse_002eerror

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alessandro Di Federico <ale@rev.ng>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <a6763f9f7b89ea310ab86f9a2b311a05254a1acd.1675779233.git.quic_mathbern@quicinc.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

diff --git a/target/hexagon/meson.build b/target/hexagon/meson.build
index c9d31d095caaba9f86bf56d1f08ed2f28aa8c976..42b03c81e632244bc6c2c2becdbbb0d22b1510c7 100644 (file)
--- a/target/hexagon/meson.build
+++ b/target/hexagon/meson.build
@@ -183,7 +183,7 @@ if idef_parser_enabled and 'hexagon-linux-user' in target_dirs
     )
 
     bison = generator(
-        find_program('bison'),
+        find_program('bison', version: '>=3.0'),
         output: ['@BASENAME@.tab.c', '@BASENAME@.tab.h'],
         arguments: ['@INPUT@', '--defines=@OUTPUT1@', '--output=@OUTPUT0@']
     )