Hi, Dipesh!
As I may have mentioned, running "meson compile parser" will generate
the files. Removing the previoulsy generated files is not required. This
is mentioned in the dev guide:
https://reports.kea.isc.org/dev_guide/d0/d9b/parser.html although I
notice now it is not properly formatted.
If you want only certain parsers generated, you can consult the list of
targets with:
$ ninja -t targets all | grep -E 'lexer:|parser:' | grep -Ev
'^meson-internal'
src-lib-eval-parser: phony
src-lib-eval-lexer: phony
src-bin-dhcp4-parser: phony
src-bin-dhcp4-lexer: phony
src-bin-dhcp6-parser: phony
src-bin-dhcp6-lexer: phony
src-bin-d2-parser: phony
src-bin-d2-lexer: phony
src-bin-agent-parser: phony
src-bin-agent-lexer: phony
src-bin-netconf-parser: phony
src-bin-netconf-lexer: phony
parser: phony
In your case, it sounds like you want to call "meson compile
src-bin-dhcp4-lexer" and "meson compile src-bin-dhcp4-parser".
Having the parsers generated automatically on compilation is indeed
something Kea has lost when leaving Autotools behind. Not intentionally.
I am not opposed to bringing it back.
Best of luck!
--
Andrei
On 15/07/2025 23:48, Dipesh Kayastha wrote:
Hi Andrei,
I'm working on Kea with a *Meson-based build system*, and I’m trying
to regenerate the parser and lexer from the available |.yy| and |.ll|
sources. I am compiling my code under Docker.
My environment:
|Program bison found: YES 3.8.2 (/usr/local/bin/bison) Program flex
found: YES 2.6.4 (/usr/bin/flex) |
So both Bison (≥3.3.0) and Flex are correctly detected.
What I tried:
I removed the generated files:
*
|src/bin/dhcp4/dhcp4_parser.cc|
*
|src/bin/dhcp4/dhcp4_lexer.cc|
Expecting Meson to regenerate them from:
*
|dhcp4_parser.yy|
*
|dhcp4_lexer.ll|
But when I run |meson setup| or |meson compile|, I get the error:
|src/bin/dhcp4/meson.build:1:12: ERROR: File dhcp4_lexer.cc does not
exist. |
It seems Meson is *expecting pre-generated files* instead of running
Flex/Bison, even though the sources are present and the tools are
available.
Question:
Is there a recommended or supported way to integrate |.yy| and |.ll|
Generation with Meson in Kea?
Any guidance or examples for Meson would be greatly appreciated!
Thanks,
Dipesh
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