rict-prototypes  -fno-strict-aliasing -fno-strict-overflow -fno-delete-null-pointer-checks -Wempty-body -mtune=generic -O2 -pipe -c -o package.lo package.c
fsm.c: In function ‘rpmPackageFilesInstall’:
fsm.c:1019:6: error: a label can only be part of a statement and a declaration is not a statement
 1019 |      int mayopen = S_ISREG(fp->sb.st_mode) || S_ISDIR(fp->sb.st_mode);
      |      ^~~
fsm.c: In function ‘removeSBITS’:
fsm.c:473:13: warning: ignoring return value of ‘fchmodat’, declared with attribute warn_unused_result [-Wunused-result]
  473 |      (void) fchmodat(dirfd, path, stb.st_mode & 0777, flags);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[3]: *** [Makefile:791: fsm.lo] Error 1
make[3]: *** Waiting for unfinished jobs....
libtool: compile:  x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I.. -I.. -I../include -I/usr/include/lua5.3 -I../misc -DLOCALEDIR=\"/usr/share/locale\" -DSYSCONFDIR=\"/etc\" -DLOCALSTATEDIR=\"/var/lib\" -DLIBRPMALIAS_FILENAME=\"rpmpopt-4.18.1\" -DLIBRPMALIAS_EXECPATH=\"/usr/bin\" -Wall -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -fno-strict-aliasing -fno-strict-overflow -fno-delete-null-pointer-checks -Wempty-body -mtune=generic -O2 -pipe -c package.c  -fPIC -DPIC -o .libs/package.o
make[3]: Leaving directory '/var/tmp/portage/app-arch/rpm-4.18.1/work/rpm-4.18.1/lib'
make[2]: *** [Makefile:587: all] Error 2
make[2]: Leaving directory '/var/tmp/portage/app-arch/rpm-4.18.1/work/rpm-4.18.1/lib'
make[1]: *** [Makefile:1303: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/portage/app-arch/rpm-4.18.1/work/rpm-4.18.1'
make: *** [Makefile:742: all] Error 2
 * ERROR: app-arch/rpm-4.18.1::core-kit failed (compile phase):

# fix label followed by declaration
sed -i 's|setmeta:|setmeta: ;|g' lib/fsm.c