Hello everyone! I'm having trouble compilig git source since version 2.50 , for RHEL 6 (both in redhat 6-6 and 6.10). the same source compiles fine in RHEL8 (Red Hat Enterprise Linux release 8.10 (Ootpa)) first compiler complans about missing random.h in compat/posix.h ,if you copy missing random.h file to RHEL6 machine to the /usr/include/sys directory then errors change to whole bunch of other errors like error: expected declaration specifiers or ‘...’ before numeric constant 45 | #define toupper(x) sane_case((unsigned char)(x), 0) both working and non working systems have same gcc 13-4.0 . Last version that compiles in both rhel 6 and rhel 8 is 2.49.1 Any ideas ? git-2.50.1# make -j $(nproc) configure && ./configure && make -j $(nproc) && make -j $(nproc) install && make -j $(nproc) clean GIT_VERSION=2.50.1 GEN configure configure: Setting lib to 'lib' (the default) configure: Will try -pthread then -lpthread to enable POSIX Threads. configure: CHECKS for site configuration checking for gcc... /usr/local/gcc-13.4.0/bin/gcc-13.4 checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether the compiler supports GNU C... yes checking whether /usr/local/gcc-13.4.0/bin/gcc-13.4 accepts -g... yes checking for /usr/local/gcc-13.4.0/bin/gcc-13.4 option to enable C11 features... none needed checking for stdio.h... yes checking for stdlib.h... yes checking for string.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for strings.h... yes checking for sys/stat.h... yes checking for sys/types.h... yes checking for unistd.h... yes checking for size_t... yes checking for working alloca.h... yes checking for alloca... yes configure: CHECKS for programs checking whether the compiler supports GNU C... (cached) yes checking whether /usr/local/gcc-13.4.0/bin/gcc-13.4 accepts -g... (cached) yes checking for /usr/local/gcc-13.4.0/bin/gcc-13.4 option to enable C11 features... (cached) none needed checking for inline... inline checking if linker supports -R... no checking if linker supports -Wl,-rpath,... yes checking for gar... no checking for ar... ar checking for gtar... gtar checking for gnudiff... no checking for gdiff... no checking for diff... diff checking for asciidoc... no configure: CHECKS for libraries checking for SHA1_Init in -lcrypto... yes checking for curl_global_init in -lcurl... yes checking for curl-config... curl-config configure: Setting CURL_LDFLAGS to '-L/usr/local/lib -lcurl' checking for XML_ParserCreate in -lexpat... yes checking for iconv in -lc... yes checking for deflateBound in -lz... yes checking for socket in -lc... yes checking for inet_ntop... yes checking for inet_pton... yes checking for hstrerror... yes checking for basename in -lc... yes checking if libc contains libintl... yes checking for libintl.h... yes configure: CHECKS for header files checking for sys/select.h... yes checking for poll.h... yes checking for sys/poll.h... yes checking for inttypes.h... (cached) yes checking for old iconv()... no checking whether iconv omits bom for utf-16 and utf-32... no configure: CHECKS for typedefs, structures, and compiler characteristics checking for socklen_t... yes checking for struct itimerval... yes checking for struct stat.st_mtimespec.tv_nsec... no checking for struct stat.st_mtim.tv_nsec... yes checking for struct dirent.d_type... yes checking for struct passwd.pw_gecos... yes checking for struct sockaddr_storage... yes checking for struct addrinfo... yes checking for getaddrinfo... yes checking for library containing getaddrinfo... none required checking how to run the C preprocessor... /usr/local/gcc-13.4.0/bin/gcc-13.4 -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking whether the platform regex supports REG_STARTEND... yes checking whether system succeeds to read fopen'ed directory... yes checking whether snprintf() and/or vsnprintf() return bogus value... no checking whether the platform uses typical file type bits... yes configure: CHECKS for library functions checking for libgen.h... yes checking for paths.h... yes checking for libcharset.h... no checking for strings.h... (cached) yes checking for locale_charset in -liconv... no checking for locale_charset in -lcharset... no checking for sysinfo... yes checking for clock_gettime... no checking for CLOCK_MONOTONIC... yes checking for sync_file_range... yes checking for library containing sync_file_range... none required checking for setitimer... yes checking for library containing setitimer... none required checking for strcasestr... yes checking for library containing strcasestr... none required checking for memmem... yes checking for library containing memmem... none required checking for strlcpy... no checking for uintmax_t... yes checking for strtoumax... yes checking for library containing strtoumax... none required checking for setenv... yes checking for library containing setenv... none required checking for unsetenv... yes checking for library containing unsetenv... none required checking for mkdtemp... yes checking for library containing mkdtemp... none required checking for initgroups... yes checking for library containing initgroups... none required checking for getdelim... yes checking for library containing getdelim... none required checking for BSD sysctl... no checking for POSIX Threads with ''... no checking for POSIX Threads with '-mt'... no checking for POSIX Threads with '-pthread'... yes configure: creating ./config.status config.status: creating config.mak.autogen config.status: executing config.mak.autogen commands * new build flags * new link flags CC base85.o CC bisect.o * new prefix flags CC blame.o CC blob.o CC bloom.o CC branch.o CC bulk-checkin.o CC bundle-uri.o CC bundle.o CC cache-tree.o CC cbtree.o CC chdir-notify.o CC checkout.o CC chunk-format.o CC color.o CC column.o In file included from compat/posix.h:449, from git-compat-util.h:26, from checkout.c:3: compat/../sane-ctype.h:29:60: error: expected expression before ‘]’ token 29 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | ^ 0) | ^ make: *** [Makefile:2821: cbtree.o] Error 1 make: *** Waiting for unfinished jobs.... make: *** [Makefile:2821: base85.o] Error 1 make: *** [Makefile:2821: chdir-notify.o] Error 1 make: *** [Makefile:2821: chunk-format.o] Error 1 make: *** [Makefile:2821: blob.o] Error 1 make: *** [Makefile:2821: color.o] Error 1 make: *** [Makefile:2821: checkout.o] Error 1 make: *** [Makefile:2821: column.o] Error 1 make: *** [Makefile:2821: bulk-checkin.o] Error 1 make: *** [Makefile:2821: branch.o] Error 1 make: *** [Makefile:2821: cache-tree.o] Error 1 make: *** [Makefile:2821: bloom.o] Error 1 make: *** [Makefile:2821: bundle-uri.o] Error 1 make: *** [Makefile:2821: bundle.o] Error 1 make: *** [Makefile:2821: bisect.o] Error 1 make: *** [Makefile:2821: blame.o] Error 1