package.bbclass: moving field data process before variable process in process_pkgconfig

Currently, the latest version abseil-cpp contains a new library named "absl_log_internal_format", it's
basic package config(.pc file) as below:

prefix=/usr
exec_prefix=${prefix}

......

Requires: absl_config = 20230125, absl_core_headers = 20230125, absl_log_internal_append_truncated = 20230125,
absl_log_internal_config = 20230125, absl_log_internal_globals = 20230125, absl_log_severity = 20230125,
absl_strings = 20230125, absl_str_format = 20230125, absl_time = 20230125, absl_span = 20230125
......

Normally, the process_pkgconfig() would process variable data before field data in a .pc file, but in the
absl_log_internal_format, the field data in "Requires" section contains "xxxx = xxxx" format, the
process_pkgconfig() treats them as normal variable and using the setVar() in bitbake's data_smart.py
try to process. The absl_log_internal_format field data contains "_append_", this hit the setVar() checking
and finally bitbake stop building and reporting an error as below:

"Variable xxx contains an operation using the old override syntax. Please convert this layer/metadata before attempting to use with a newer bitbake."

This patch move the field data process before variable process to avoid the process_pkgconfig() treat the field
data as variable.

(From OE-Core rev: e7d3e02a624f7ce23d012bb11ad1df2049066b37)

Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
(cherry picked from commit a73e269d3e591a10bb397b94b82e3fb960112d33)
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index fed2f5531d..67351b2510 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -2178,18 +2178,18 @@ python package_do_pkgconfig () {
                     with open(file, 'r') as f:
                         lines = f.readlines()
                     for l in lines:
-                        m = var_re.match(l)
-                        if m:
-                            name = m.group(1)
-                            val = m.group(2)
-                            pd.setVar(name, pd.expand(val))
-                            continue
                         m = field_re.match(l)
                         if m:
                             hdr = m.group(1)
                             exp = pd.expand(m.group(2))
                             if hdr == 'Requires':
                                 pkgconfig_needed[pkg] += exp.replace(',', ' ').split()
+                                continue
+                        m = var_re.match(l)
+                        if m:
+                            name = m.group(1)
+                            val = m.group(2)
+                            pd.setVar(name, pd.expand(val))
 
     for pkg in packages.split():
         pkgs_file = os.path.join(shlibswork_dir, pkg + ".pclist")