From: Sergiu Moga <sergiu@unikraft.io>
Date: Thu, 6 Feb 2025 09:26:55 +0000 (+0200)
Subject: Introduce `EACHOLIB_EXPORTS`
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b7d6ee32140c0d7aceb27313d8614ed8f99607bc;p=unikraft%2Funikraft.git

Introduce `EACHOLIB_EXPORTS`

Introduce the equivalent of `EACHOLIB_LOCALS`, but for exportsyms.uk.
Now, one is able to add custom defined/named exportsyms.uk, in addition
to an already existing exportsyms.uk. If no exportsyms.uk exists, then,
unlike `EACHOLIB_LOCALS` which is processed regardless of whether a
localsyms.uk exists or not, `EACHOLIB_EXPORTS` will be ignored.
However, its result files may still be built as per Makefile recipe
dependencies.

Checkpatch-Ignore: UNIKRAFT_SUBJECT_FORMAT
Signed-off-by: Sergiu Moga <sergiu@unikraft.io>
Reviewed-by: Michalis Pappas <michalis@unikraft.io>
Approved-by: Michalis Pappas <michalis@unikraft.io>
GitHub-Closes: #1577
---

diff --git a/Makefile b/Makefile
index e6e45e408..bf41e1583 100644
--- a/Makefile
+++ b/Makefile
@@ -378,6 +378,8 @@ EACHOLIB_ALIBS :=
 EACHOLIB_ALIBS-y :=
 EACHOLIB_LOCALS :=
 EACHOLIB_LOCALS-y :=
+EACHOLIB_EXPORTS :=
+EACHOLIB_EXPORTS-y :=
 
 # Pull in the user's configuration file
 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
diff --git a/support/build/Makefile.rules b/support/build/Makefile.rules
index 365fc1213..d60617784 100644
--- a/support/build/Makefile.rules
+++ b/support/build/Makefile.rules
@@ -1021,10 +1021,15 @@ $(call libname2preolib,$(1)): $$($(call vprefix_lib,$(1),OBJS)) \
 
 $(call libname2olib,$(1)): $(call libname2preolib,$(1)) \
 			   $$($(call vprefix_lib,$(1),EXPORTS)) $$($(call vprefix_lib,$(1),EXPORTS-y)) \
+			   $$(EACHOLIB_EXPORTS) $$(EACHOLIB_EXPORTS-y) \
 			   $$($(call vprefix_lib,$(1),LOCALS)) $$($(call vprefix_lib,$(1),LOCALS-y)) \
 			   $$(EACHOLIB_LOCALS) $$(EACHOLIB_LOCALS-y)
 	$(call build_cmd,OBJCOPY,,$(call libname2olib,$(1)),\
-		$(OBJCOPY) $$(addprefix --keep-global-symbols=,$$($(call vprefix_lib,$(1),EXPORTS)) $$($(call vprefix_lib,$(1),EXPORTS-y))) \
+		$(OBJCOPY) \
+			   $$(addprefix --keep-global-symbols=,$$($(call vprefix_lib,$(1),EXPORTS)) $$($(call vprefix_lib,$(1),EXPORTS-y))) \
+			   $$(if \
+				$$(and $$(strip $$($(call vprefix_lib,$(1),EXPORTS)) $$($(call vprefix_lib,$(1),EXPORTS-y))), $$(strip $$(EACHOLIB_EXPORTS) $$(EACHOLIB_EXPORTS-y))), \
+				$$(addprefix --keep-global-symbols=,$$(EACHOLIB_EXPORTS) $$(EACHOLIB_EXPORTS-y))) \
 			   $$(addprefix --localize-symbols=,$$($(call vprefix_lib,$(1),LOCALS)) $$($(call vprefix_lib,$(1),LOCALS-y))) \
 			   $$(addprefix --localize-symbols=,$$(EACHOLIB_LOCALS) $$(EACHOLIB_LOCALS-y)) \
 		           $$(OBJCFLAGS) $$(OBJCFLAGS-y) \