Add a way to add arbitrary text to the top of a spec file.  This
can be useful for adding specific tags to the produced binaries for
tracking purposes.

Signed-off-by: Mark Hatle <mark.ha...@windriver.com>
---
 meta/classes/package_rpm.bbclass |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/meta/classes/package_rpm.bbclass b/meta/classes/package_rpm.bbclass
index 469526b..d03dc3f 100644
--- a/meta/classes/package_rpm.bbclass
+++ b/meta/classes/package_rpm.bbclass
@@ -817,6 +817,12 @@ python write_specfile () {
        except OSError:
                raise bb.build.FuncFailed("unable to open spec file for 
writing.")
 
+       # RPMSPEC_PREAMBLE is a way to add arbitrary text to the top
+       # of the generated spec file
+       external_preamble = d.getVar("RPMSPEC_PREAMBLE", True)
+       if external_preamble:
+               specfile.write(external_preamble + "\n")
+
        for line in spec_preamble_top:
                specfile.write(line + "\n")
 
-- 
1.7.3.4


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