[PATCH 2/2] package_rpm: add RPMBUILD_EXTRA_PARAMS variable

[Martin Jansa <martin.jansa@gmail.com>]

* e.g. for DISTROs which define extra user-defined fields with
  PACKAGE_ADD_METADATA/PACKAGE_ADD_METADATA_RPM
  as undefined fields in packagedata are fatal error for rpmbuild:
  "error: line 9: Unknown tag: Author: Unspecified"
  as shown in:
  http://errors.yoctoproject.org/Errors/Details/751706/
  with "Author" field added with:

  PACKAGE_CLASSES = "package_rpm"
  PACKAGE_ADD_AUTHOR_METADATA = "test-author"
  PACKAGE_ADD_METADATA = "Author: ${PACKAGE_ADD_AUTHOR_METADATA}"

  to fix rpm build you can use:
  RPMBUILD_EXTRA_PARAMS = " --define '_Author Author'"
  keep in mind that this doesn't cause this Author field to be
  added in .rpm, it just avoids the BUILDSPEC failure.

  and for ipk build:
  OPKG_MAKE_INDEX_EXTRA_PARAMS = "-f"

  alternatively you can avoid additional packagedata fields ending
  in the package manager (if you use them only with buildhistory
  or packagedata) with:
  PACKAGE_ADD_METADATA_RPM = ""
  PACKAGE_ADD_METADATA_IPK = ""
  PACKAGE_ADD_METADATA_DEP = ""

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
---
 meta/classes-global/package_rpm.bbclass | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/classes-global/package_rpm.bbclass b/meta/classes-global/package_rpm.bbclass
index 819ee50278..f932d2c928 100644
--- a/meta/classes-global/package_rpm.bbclass
+++ b/meta/classes-global/package_rpm.bbclass
@@ -683,6 +683,7 @@ python do_package_rpm () {
     # Setup the rpmbuild arguments...
     rpmbuild = d.getVar('RPMBUILD')
     rpmbuild_compmode = d.getVar('RPMBUILD_COMPMODE')
+    rpmbuild_extra_params = d.getVar('RPMBUILD_EXTRA_PARAMS')
 
     # Too many places in dnf stack assume that arch-independent packages are "noarch".
     # Let's not fight against this.
@@ -724,6 +725,7 @@ python do_package_rpm () {
     cmd = cmd + " --define '_use_weak_usergroup_deps 1'"
     cmd = cmd + " --define '_passwd_path " + "/completely/bogus/path" + "'"
     cmd = cmd + " --define '_group_path " + "/completely/bogus/path" + "'"
+    cmd = cmd + rpmbuild_extra_params
     if d.getVarFlag('ARCHIVER_MODE', 'srpm') == '1' and bb.data.inherits_class('archiver', d):
         cmd = cmd + " --define '_sourcedir " + d.getVar('ARCHIVER_OUTDIR') + "'"
         cmdsrpm = cmd + " --define '_srcrpmdir " + d.getVar('ARCHIVER_RPMOUTDIR') + "'"
-- 
2.43.0