libudev/builtin.mk: needs pkg-config handling (copypasta'd from libusb1)

[Tobias Nygren <tnn%NetBSD.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Tobias Nygren <tnn%NetBSD.org@localhost>
Pushed By:	tnn
Date:		Thu Jul 21 14:07:13 2022 +0200
Changeset:	70de9a91a1da5b42b3f9e4b4afe98ed4fdb23b45

Modified Files:
	libudev/builtin.mk

Log Message:
libudev/builtin.mk: needs pkg-config handling (copypasta'd from libusb1)

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=70de9a91a1da5b42b3f9e4b4afe98ed4fdb23b45

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 libudev/builtin.mk | 51 ++++++++++++++++++++++-----------------------------
 1 file changed, 22 insertions(+), 29 deletions(-)

diffs:
diff --git a/libudev/builtin.mk b/libudev/builtin.mk
index cf238205ed..b5608c5a73 100644
--- a/libudev/builtin.mk
+++ b/libudev/builtin.mk
@@ -2,45 +2,38 @@
 
 BUILTIN_PKG:=	libudev
 
-BUILTIN_FIND_HEADERS_VAR:=	LIBUDEV_H
-BUILTIN_FIND_HEADERS.LIBUDEV_H=	libudev.h
+BUILTIN_FIND_PKGCONFIG_FILES_VAR:=		LIBUDEV_PC
+BUILTIN_FIND_PKGCONFIG_FILES.LIBUDEV_PC=	libudev.pc
 
 .include "../../mk/buildlink3/bsd.builtin.mk"
 
-###
-### Determine if there is a built-in implementation of the package and
-### set IS_BUILTIN.<pkg> appropriately ("yes" or "no").
-###
 .if !defined(IS_BUILTIN.libudev)
 IS_BUILTIN.libudev=	no
-.  if empty(LIBUDEV_H:M__nonexistent__) && empty(LIBUDEV_H:M${LOCALBASE}/*)
+.  if empty(LIBUDEV_PC:M__nonexistent__)
 IS_BUILTIN.libudev=	yes
 .  endif
 .endif
 MAKEVARS+=		IS_BUILTIN.libudev
 
-###
-### If there is a built-in implementation, then set BUILTIN_PKG.<pkg> to
-### a package name to represent the built-in package.
-###
-.if !defined(BUILTIN_PKG.libudev) && \
-    !empty(IS_BUILTIN.libudev:M[yY][eE][sS]) && \
-    empty(LIBUDEV_H:M__nonexistent__)
-
-###
-### Determine whether we should use the built-in implementation if it
-### exists, and set USE_BUILTIN.<pkg> appropriate ("yes" or "no").
-###
-.  if !defined(USE_BUILTIN.libudev)
-.    if ${PREFER.libudev} == "pkgsrc"
-USE_BUILTIN.libudev=	no
-.    else
+.if !defined(USE_BUILTIN.libudev)
 USE_BUILTIN.libudev=	${IS_BUILTIN.libudev}
-.      if defined(BUILTIN_PKG.libudev) && \
-        !empty(IS_BUILTIN.libudev:M[yY][eE][sS])
-USE_BUILTIN.libudev=	yes
-.      endif
-.    endif  # PREFER.libudev
+.endif
+
+.if !empty(USE_BUILTIN.libudev:M[yY][eE][sS])
+.  if !empty(USE_TOOLS:C/:.*//:Mpkg-config)
+do-configure-pre-hook: link-libudev-pkgconfig
+
+BLKDIR_PKGCFG=		${BUILDLINK_DIR}/lib/pkgconfig
+LIBUDEV_PKGCFGF=	${BUILTIN_FIND_PKGCONFIG_FILES.LIBUDEV_PC}
+
+.PHONY: link-libudev-pkgconfig link-message-libudev-pkgconfig
+link-libudev-pkgconfig: link-message-libudev-pkgconfig
+link-message-libudev-pkgconfig:
+	@${STEP_MSG} "Linking ${LIBUDEV_PC} file into ${BUILDLINK_DIR}."
+
+link-libudev-pkgconfig:
+	${RUN}						\
+	${MKDIR} ${BLKDIR_PKGCFG};			\
+	${LN} -sf ${LIBUDEV_PC} ${BLKDIR_PKGCFG}/${LIBUDEV_PKGCFGF}
 .  endif
-MAKEVARS+=		USE_BUILTIN.libudev
 .endif