For some packages, expanded specfile is so big, it causes srpm headers to
exceed 16 mb, which then can't be extracted by old rpms (pre 4.13) - they throw
an error, "headerRead failed: hdr data: BAD, no. of bytes(20966277) out of
range".
The code in question is in build/pack.c:
/* Include spec in parsed and expanded form */
headerPutString(sourcePkg->header, RPMTAG_SPEC, getStringBuf(spec->parsed));
For my purposes, a magic envvar would work best, a-la
char *NO_SPEC_TAG = getenv("RPMBUILD_NO_SPEC_TAG");
if (!NO_SPEC_TAG || atoi(NO_SPEC_TAG) != 1) {
/* Include spec in parsed and expanded form */
headerPutString(sourcePkg->header, RPMTAG_SPEC,
getStringBuf(spec->parsed));
}
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