Bug#986746: systemd: Symbols are missing when building systemd by Clang

Michael Biebl Sun, 11 Apr 2021 06:15:13 -0700

Control: reassign -1 lld-11
Am 11.04.21 um 14:21 schrieb Michael Biebl:

Hello,
I was surprised reading this bug report, givent that the systemd upstream CI runs Clang builds with different Clang versions.
I rebuilt both the buster and sid/bullseye systemd package in a corresponding build chroot with clang/llvm-dev with no source changes.
sid built successfully and passed all tests,
buster built successfully as well but had one failing test (test-strip-tab-ansi). Rebuilding with "nocheck" was successful.

Ok, the missing part was that you not only used clang but also the llvm based linker.

So lld is the real culprit here, thus reassigning.

I could reproduce the issue on sid with lld-11, so reassigning to that package.


Excerpt from the build log

dh_makeshlibs -plibudev1 --add-udeb=libudev1-udeb -- -c0

dpkg-gensymbols: warning: some symbols or patterns disappeared in the symbols file: see diff output below dpkg-gensymbols: warning: debian/libudev1/DEBIAN/symbols doesn't match completely debian/libudev1.symbols

--- debian/libudev1.symbols (libudev1_247.3-3_amd64)
+++ dpkg-gensymbolsDoJqNd       2021-04-11 13:02:31.114254096 +0000
@@ -1,11 +1,11 @@
 libudev.so.1 libudev1 #MINVER#
 * Build-Depends-Package: libudev-dev
- LIBUDEV_183@LIBUDEV_183 183
- LIBUDEV_189@LIBUDEV_189 189
- LIBUDEV_196@LIBUDEV_196 196
- LIBUDEV_199@LIBUDEV_199 199
- LIBUDEV_215@LIBUDEV_215 215
- LIBUDEV_247@LIBUDEV_247 247
+#MISSING: 247.3-3# LIBUDEV_183@LIBUDEV_183 183
+#MISSING: 247.3-3# LIBUDEV_189@LIBUDEV_189 189
+#MISSING: 247.3-3# LIBUDEV_196@LIBUDEV_196 196
+#MISSING: 247.3-3# LIBUDEV_199@LIBUDEV_199 199
+#MISSING: 247.3-3# LIBUDEV_215@LIBUDEV_215 215
+#MISSING: 247.3-3# LIBUDEV_247@LIBUDEV_247 247
  udev_device_get_action@LIBUDEV_183 183
  udev_device_get_current_tags_list_entry@LIBUDEV_247 247
  udev_device_get_devlinks_list_entry@LIBUDEV_183 183
dh_makeshlibs -psystemd -Xlibsystemd-shared -- -c0
dh_makeshlibs --remaining-packages -- -c0

dpkg-gensymbols: warning: some new symbols appeared in the symbols file: see diff output below dpkg-gensymbols: warning: some symbols or patterns disappeared in the symbols file: see diff output below dpkg-gensymbols: warning: debian/libsystemd0/DEBIAN/symbols doesn't match completely debian/libsystemd0.symbols

--- debian/libsystemd0.symbols (libsystemd0_247.3-3_amd64)
+++ dpkg-gensymbolsuYW0SJ       2021-04-11 13:02:34.350300727 +0000
@@ -1,33 +1,35 @@
 libsystemd.so.0 libsystemd0 #MINVER#
 * Build-Depends-Package: libsystemd-dev
- LIBSYSTEMD_209@LIBSYSTEMD_209 0
- LIBSYSTEMD_211@LIBSYSTEMD_211 211
- LIBSYSTEMD_213@LIBSYSTEMD_213 213
- LIBSYSTEMD_214@LIBSYSTEMD_214 214
- LIBSYSTEMD_216@LIBSYSTEMD_216 217
- LIBSYSTEMD_217@LIBSYSTEMD_217 217
- LIBSYSTEMD_219@LIBSYSTEMD_219 219
- LIBSYSTEMD_220@LIBSYSTEMD_220 220
- LIBSYSTEMD_221@LIBSYSTEMD_221 221
- LIBSYSTEMD_222@LIBSYSTEMD_222 222
- LIBSYSTEMD_226@LIBSYSTEMD_226 226
- LIBSYSTEMD_227@LIBSYSTEMD_227 227
- LIBSYSTEMD_229@LIBSYSTEMD_229 229
- LIBSYSTEMD_230@LIBSYSTEMD_230 230
- LIBSYSTEMD_231@LIBSYSTEMD_231 231
- LIBSYSTEMD_232@LIBSYSTEMD_232 232
- LIBSYSTEMD_233@LIBSYSTEMD_233 233
- LIBSYSTEMD_234@LIBSYSTEMD_234 234
- LIBSYSTEMD_236@LIBSYSTEMD_236 236
- LIBSYSTEMD_237@LIBSYSTEMD_237 237
- LIBSYSTEMD_238@LIBSYSTEMD_238 238
- LIBSYSTEMD_239@LIBSYSTEMD_239 239
- LIBSYSTEMD_240@LIBSYSTEMD_240 240
- LIBSYSTEMD_241@LIBSYSTEMD_241 241
- LIBSYSTEMD_243@LIBSYSTEMD_243 243
- LIBSYSTEMD_245@LIBSYSTEMD_245 245
- LIBSYSTEMD_246@LIBSYSTEMD_246 246
- LIBSYSTEMD_247@LIBSYSTEMD_247 247
+#MISSING: 247.3-3# LIBSYSTEMD_209@LIBSYSTEMD_209 0
+#MISSING: 247.3-3# LIBSYSTEMD_211@LIBSYSTEMD_211 211
+#MISSING: 247.3-3# LIBSYSTEMD_213@LIBSYSTEMD_213 213
+#MISSING: 247.3-3# LIBSYSTEMD_214@LIBSYSTEMD_214 214
+#MISSING: 247.3-3# LIBSYSTEMD_216@LIBSYSTEMD_216 217
+#MISSING: 247.3-3# LIBSYSTEMD_217@LIBSYSTEMD_217 217
+#MISSING: 247.3-3# LIBSYSTEMD_219@LIBSYSTEMD_219 219
+#MISSING: 247.3-3# LIBSYSTEMD_220@LIBSYSTEMD_220 220
+#MISSING: 247.3-3# LIBSYSTEMD_221@LIBSYSTEMD_221 221
+#MISSING: 247.3-3# LIBSYSTEMD_222@LIBSYSTEMD_222 222
+#MISSING: 247.3-3# LIBSYSTEMD_226@LIBSYSTEMD_226 226
+#MISSING: 247.3-3# LIBSYSTEMD_227@LIBSYSTEMD_227 227
+#MISSING: 247.3-3# LIBSYSTEMD_229@LIBSYSTEMD_229 229
+#MISSING: 247.3-3# LIBSYSTEMD_230@LIBSYSTEMD_230 230
+#MISSING: 247.3-3# LIBSYSTEMD_231@LIBSYSTEMD_231 231
+#MISSING: 247.3-3# LIBSYSTEMD_232@LIBSYSTEMD_232 232
+#MISSING: 247.3-3# LIBSYSTEMD_233@LIBSYSTEMD_233 233
+#MISSING: 247.3-3# LIBSYSTEMD_234@LIBSYSTEMD_234 234
+#MISSING: 247.3-3# LIBSYSTEMD_236@LIBSYSTEMD_236 236
+#MISSING: 247.3-3# LIBSYSTEMD_237@LIBSYSTEMD_237 237
+#MISSING: 247.3-3# LIBSYSTEMD_238@LIBSYSTEMD_238 238
+#MISSING: 247.3-3# LIBSYSTEMD_239@LIBSYSTEMD_239 239
+#MISSING: 247.3-3# LIBSYSTEMD_240@LIBSYSTEMD_240 240
+#MISSING: 247.3-3# LIBSYSTEMD_241@LIBSYSTEMD_241 241
+#MISSING: 247.3-3# LIBSYSTEMD_243@LIBSYSTEMD_243 243
+#MISSING: 247.3-3# LIBSYSTEMD_245@LIBSYSTEMD_245 245
+#MISSING: 247.3-3# LIBSYSTEMD_246@LIBSYSTEMD_246 246
+#MISSING: 247.3-3# LIBSYSTEMD_247@LIBSYSTEMD_247 247
+ __start_SYSTEMD_BUS_ERROR_MAP@Base 247.3-3
+ __stop_SYSTEMD_BUS_ERROR_MAP@Base 247.3-3
  sd_booted@LIBSYSTEMD_209 0
  sd_bus_add_fallback@LIBSYSTEMD_221 221
  sd_bus_add_fallback_vtable@LIBSYSTEMD_221 221

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Bug#986746: systemd: Symbols are missing when building systemd by Clang

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