https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95480
Bug ID: 95480 Summary: GCOV change breaks AIX build Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: critical Priority: P3 Component: gcov-profile Assignee: unassigned at gcc dot gnu.org Reporter: dje at gcc dot gnu.org CC: marxin at gcc dot gnu.org Target Milestone: --- Target: powerpc-ibm-aix* The June 2 change to gcov breaks AIX because it now requires atomic 64 bit operations in 32 bit mode. g++-6.2.0 -std=c++11 -no-pie -g -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -static-libstdc++ -static-libgcc -Wl,-bbigtoc gcov-tool.o libgcov-util.o libgcov-driver-tool.o libgcov-merge-tool.o libcommon.a ../libcpp/libcpp.a ./../intl/libintl.a /gsa/yktgsa/home/e/d/edelsohn/install/lib/libiconv.a ../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a -o gcov-tool ld: 0711-317 ERROR: Undefined symbol: .__atomic_fetch_add_8 ld: 0711-317 ERROR: Undefined symbol: .__sync_val_compare_and_swap_8 ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. collect2: error: ld returned 8 exit status make: *** [Makefile:3044: gcov-tool] Error 1