[PATCH v2 08/18] hw: Include minimal source set in user emulation build

[Paolo Bonzini <pbonzini@redhat.com>]

From: Philippe Mathieu-Daudé <philmd@linaro.org>

Only the files in hwcore_ss[] are required to link a user emulation
binary.

Have meson process the hw/ sub-directories if system emulation is
selected, otherwise directly process hw/core/ to get hwcore_ss[], which
is the only set required by user emulation.

This removes about 10% from the time needed to run
"../configure --disable-system --disable-tools --disable-guest-agent".

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240404194757.9343-8-philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 09668e3c5f5..e8ac846fc5a 100644
--- a/meson.build
+++ b/meson.build
@@ -3447,8 +3447,12 @@ subdir('qom')
 subdir('authz')
 subdir('crypto')
 subdir('ui')
-subdir('hw')
 subdir('gdbstub')
+if have_system
+  subdir('hw')
+else
+  subdir('hw/core')
+endif
 
 if enable_modules
   libmodulecommon = static_library('module-common', files('module-common.c') + genh, pic: true, c_args: '-DBUILD_DSO')
-- 
2.44.0