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Re: [PATCH 4/4] stubdom: add fine grained library config items to Mini-OS configs


  • To: Anthony PERARD <anthony.perard@xxxxxxxxxx>
  • From: Jürgen Groß <jgross@xxxxxxxx>
  • Date: Mon, 7 Oct 2024 17:08:14 +0200
  • Autocrypt: addr=jgross@xxxxxxxx; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCw3p3WKL8TL8eZB/9G0juS/kDY9LhEXseh mE9U+iA1VsLhgDqVbsOtZ/S14LRFHczNd/Lqkn7souCSoyWsBs3/wO+OjPvxf7m+Ef+sMtr0 G5lCWEWa9wa0IXx5HRPW/ScL+e4AVUbL7rurYMfwCzco+7TfjhMEOkC+va5gzi1KrErgNRHH kg3PhlnRY0Udyqx++UYkAsN4TQuEhNN32MvN0Np3WlBJOgKcuXpIElmMM5f1BBzJSKBkW0Jc Wy3h2Wy912vHKpPV/Xv7ZwVJ27v7KcuZcErtptDevAljxJtE7aJG6WiBzm+v9EswyWxwMCIO RoVBYuiocc51872tRGywc03xaQydB+9R7BHPzsBNBFOMcBYBCADLMfoA44MwGOB9YT1V4KCy vAfd7E0BTfaAurbG+Olacciz3yd09QOmejFZC6AnoykydyvTFLAWYcSCdISMr88COmmCbJzn sHAogjexXiif6ANUUlHpjxlHCCcELmZUzomNDnEOTxZFeWMTFF9Rf2k2F0Tl4E5kmsNGgtSa aMO0rNZoOEiD/7UfPP3dfh8JCQ1VtUUsQtT1sxos8Eb/HmriJhnaTZ7Hp3jtgTVkV0ybpgFg w6WMaRkrBh17mV0z2ajjmabB7SJxcouSkR0hcpNl4oM74d2/VqoW4BxxxOD1FcNCObCELfIS auZx+XT6s+CE7Qi/c44ibBMR7hyjdzWbABEBAAHCwF8EGAECAAkFAlOMcBYCGwwACgkQsN6d 1ii/Ey9D+Af/WFr3q+bg/8v5tCknCtn92d5lyYTBNt7xgWzDZX8G6/pngzKyWfedArllp0Pn fgIXtMNV+3t8Li1Tg843EXkP7+2+CQ98MB8XvvPLYAfW8nNDV85TyVgWlldNcgdv7nn1Sq8g HwB2BHdIAkYce3hEoDQXt/mKlgEGsLpzJcnLKimtPXQQy9TxUaLBe9PInPd+Ohix0XOlY+Uk QFEx50Ki3rSDl2Zt2tnkNYKUCvTJq7jvOlaPd6d/W0tZqpyy7KVay+K4aMobDsodB3dvEAs6 ScCnh03dDAFgIq5nsB11j3KPKdVoPlfucX2c7kGNH+LUMbzqV6beIENfNexkOfxHfw==
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
  • Delivery-date: Mon, 07 Oct 2024 15:08:43 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 07.10.24 16:15, Anthony PERARD wrote:
On Sat, Oct 05, 2024 at 05:15:48PM +0200, Juergen Gross wrote:
diff --git a/stubdom/Makefile b/stubdom/Makefile
index 8c503c2bf8..3b501a0710 100644
--- a/stubdom/Makefile
+++ b/stubdom/Makefile
@@ -340,6 +340,14 @@ endef
$(foreach lib,$(STUB_LIBS),$(eval $(call BUILD_lib,$(lib)))) +define BUILD_config
+ cp $< $@
+ for i in $(sort $(APP_LIBS) $(call xenlibs-dependencies,$(APP_LIBS))); do \
+   u=`echo $$i | tr a-z A-Z`; \
+   echo "CONFIG_LIBXEN$$u=y"; \
+ done >> $@
+endef

I don't think I like having a recipe hidden like that in a variable,
maybe if it was a full rule it would be a bit less annoying to me. But
how about something slightly different:

First, the name, "GEN_config" would be a bit better, then we could have
it only do the output and not writing any file:

define GEN_config
  (cat '$<' && \
  for i in $(sort $(APP_LIBS) $(call xenlibs-dependencies,$(APP_LIBS))); do \
    u=`echo $$i | tr a-z A-Z`; \
    echo "CONFIG_LIBXEN$$u=y"; \
  done)
endef

The this can be used in rules as:
     $(GEN_config) > $@

Would that be ok?

Absolutely fine with me.

(It might be better to have the macro not depends on the environment
have take parameter explicitly which could be used as $(call
GEN_config,$<,evtchn gnttab) > $@ or take a variable if it's useful
elsewhere, but I'm already fine if $@ is taken out of the macro.)

+
  xenstore/stamp: $(XEN_ROOT)/tools/xenstored/Makefile.common
        $(do_links)
@@ -373,8 +381,12 @@ $(TARGETS_MINIOS): mini-os-%:
  # ioemu
  #######
-ioemu-minios-config.mk: $(CURDIR)/ioemu-minios.cfg
-       MINIOS_CONFIG="$<" CONFIG_FILE="$(CURDIR)/$@" $(MAKE) DESTDIR= -C 
$(MINI_OS) config
+ioemu-minios.out.cfg: APP_LIBS = evtchn gnttab ctrl guest
+ioemu-minios.out.cfg: $(CURDIR)/ioemu-minios.cfg Makefile

Could you change the suffix to ".gen.cfg"? ".out.cfg" is a bit generic
while "generated" is more common for the kind of file that are
automatically generated by the build system for it's own use.

Okay.


BTW, in the first prerequisite, $(CURDIR) isn't necessary anymore, it
was only to be used in "MINIOS_CONFIG" just below.

Ah, right. Will remove it.


Juergen

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