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IDProjectCategoryView StatusLast Update
0017375CentOS-7javapublic2020-05-19 03:57
Reporterxliu Assigned To 
Status newResolutionopen 
Summary0017375: java-11-openjdk can't build with gcc6+
DescriptionThis line doesn't seem correct.

The reason is hotspot must depend on a flag called '-fno-lifetime-dse'. It first appears in gcc6. ie.,it must be present to prohibit g++ from optimizing objects based on their lifetime.

When configure try to detect if CC supports "-fno-lifetime-dse -Werror", the result is disturbed by the presence of -std=gnu++98 in CFLAGS. The flag -sdt=gnu++98 should only be valid for g++.

configure:55513: checking if CC supports "-fno-lifetime-dse -Werror"
configure:55531: /usr/bin/gcc -c -m64 -g -pipe -Wformat -Wno-cpp -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -std=gnu++98 -Wno-error -fno-delete-null-pointer-checks -fno-lifetime-dse -Werror conftest.c >&5
cc1: error: command line option '-std=gnu++98' is valid for C++/ObjC++ but not for C [-Werror]
cc1: all warnings being treated as errors
configure:55531: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "OpenJDK"
| #define PACKAGE_TARNAME "openjdk"
| #define PACKAGE_VERSION "openjdk"
| #define PACKAGE_STRING "OpenJDK openjdk"
| #define PACKAGE_URL ""
| #define STDC_HEADERS 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_STDIO_H 1
| #define SIZEOF_INT_P 8
| /* end confdefs.h. */
| int i;
configure:55546: result: no
configure:55630: checking if CXX supports "-fno-lifetime-dse -Werror"
configure:55648: /usr/bin/g++ -c -fno-lifetime-dse -Werror conftest.cpp >&5
configure:55648: $? = 0
configure:55663: result: yes
configure:55687: checking if both CC and CXX support "-fno-lifetime-dse -Werror"
configure:55694: result: no

jdk11 still carries some undefined bahaviors. without -fno-lifetime-dse, c1 acts weird. you can't complete the whole building process of openjdk11.
Steps To Reproducerpm build with gcc6+
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Issue History

Date Modified Username Field Change
2020-05-19 03:57 xliu New Issue