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rudix-mac / rudix

Build system target on macOS with precompiled packages
https://rudix.org
BSD 3-Clause "New" or "Revised" License
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Can't build m4 version 1.4.18 #100

Closed paaguti closed 4 years ago

paaguti commented 5 years ago

Hi,

fresh clone from your repo. Went to Ports/m4 and launched make

Transcript of the session:

paag@paag:/...es/SAMSUNG/Devel$ git clone https://github.com/rudix-mac/rudix.git
Cloning into 'rudix'...
remote: Enumerating objects: 195, done.
remote: Counting objects: 100% (195/195), done.
remote: Compressing objects: 100% (131/131), done.
remote: Total 26861 (delta 22), reused 106 (delta 16), pack-reused 26666
Receiving objects: 100% (26861/26861), 5.87 MiB | 7.30 MiB/s, done.
Resolving deltas: 100% (11563/11563), done.
Checking out files: 100% (554/554), done.
paag@paag:/...es/SAMSUNG/Devel$ cd rudix/Ports/
paag@paag:/...evel/rudix/Ports$ cd m4/
paag@paag:/...l/rudix/Ports/m4$ ls
Makefile
paag@paag:/...l/rudix/Ports/m4$ make clean
rm -rf install m4-install
rm -rf prep build check test m4-build *~
paag@paag:/...l/rudix/Ports/m4$ make
Rudix: Info: Retrieving source from 'https://ftp.gnu.org/gnu/m4/m4-1.4.18.tar.bz2'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1481k  100 1481k    0     0   792k      0  0:00:01  0:00:01 --:--:--  792k
Rudix: Info: Done!
Rudix: Info: Preparing 'm4' to build on 'm4-build'
m4-1.4.18 -> m4-build
Rudix: Info: Done!
Rudix: Info: Building 'm4' from 'm4-build'
configure: WARNING: unrecognized options: --enable-nls
configure: creating cache /Volumes/SAMSUNG/Devel/rudix/Ports/m4/config.cache
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... build-aux/install-sh -c -d
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking for gcc... gcc
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 we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking whether _XOPEN_SOURCE should be defined... no
checking for Minix Amsterdam compiler... no
checking for ar... ar
checking the archiver (ar) interface... ar
checking for ar... (cached) ar
checking for ranlib... ranlib
checking build system type... x86_64-apple-darwin17.7.0
checking host system type... x86_64-apple-darwin17.7.0
checking for _LARGEFILE_SOURCE value needed for large files... no
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for gcc option to accept ISO C99... none needed
checking for gcc option to accept ISO Standard C... (cached) none needed
configure: autobuild project... GNU M4
configure: autobuild revision... 1.4.18
configure: autobuild hostname... paag.local
configure: autobuild timestamp... 20190726T082531Z
checking for unsigned long long int... yes
checking for long long int... yes
checking for unsigned long long int... (cached) yes
checking for size_t... yes
checking for working alloca.h... yes
checking for alloca... yes
checking whether <wchar.h> uses 'inline' correctly... yes
checking for btowc... yes
checking for setrlimit... yes
checking for sigaltstack... yes
checking for canonicalize_file_name... no
checking for getcwd... yes
checking for readlink... yes
checking for realpath... yes
checking for _set_invalid_parameter_handler... no
checking for fcntl... yes
checking for symlink... yes
checking for mempcpy... no
checking for fpurge... yes
checking for __fpurge... no
checking for __freadahead... no
checking for __freading... no
checking for getdtablesize... yes
checking for getprogname... yes
checking for getexecname... no
checking for gettimeofday... yes
checking for lstat... yes
checking for mbsinit... yes
checking for mbrtowc... yes
checking for mprotect... yes
checking for mkstemp... yes
checking for nl_langinfo... yes
checking for pipe2... no
checking for isblank... yes
checking for iswctype... yes
checking for link... yes
checking for secure_getenv... no
checking for getuid... yes
checking for geteuid... yes
checking for getgid... yes
checking for getegid... yes
checking for sigaction... yes
checking for siginterrupt... yes
checking for snprintf... yes
checking for strndup... yes
checking for pipe... yes
checking for vasnprintf... no
checking for wcrtomb... yes
checking for iswcntrl... yes
checking for newlocale... yes
checking for setenv... yes
checking for sleep... yes
checking for strdup... yes
checking for wctob... yes
checking for nl_langinfo and CODESET... yes
checking for a traditional french locale... fr_FR.ISO8859-1
checking for ucontext.h... no
checking for unistd.h... (cached) yes
checking for sys/param.h... yes
checking for sys/socket.h... yes
checking for stdio_ext.h... no
checking for sys/stat.h... (cached) yes
checking for getopt.h... yes
checking for sys/time.h... yes
checking for langinfo.h... yes
checking for limits.h... yes
checking for xlocale.h... yes
checking for math.h... yes
checking for sys/mman.h... yes
checking for malloc.h... no
checking for sys/cdefs.h... yes
checking for spawn.h... yes
checking for wchar.h... yes
checking for stdint.h... (cached) yes
checking for sys/wait.h... yes
checking for features.h... no
checking for wctype.h... yes
checking for dirent.h... yes
checking for inttypes.h... (cached) yes
checking for working C stack overflow detection... yes
checking for correct stack_t interpretation... yes
checking for precise C stack overflow detection... no
checking for ld used by gcc... /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
checking if the linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) is GNU ld... no
checking for shared library run path origin... done
checking for libsigsegv... no, consider installing GNU libsigsegv
checking whether // is distinct from /... no
checking whether realpath works... no
checking if environ is properly declared... no
checking whether the preprocessor supports include_next... yes
checking whether system header files limit the line length... no
checking for complete errno.h... yes
checking whether strerror_r is declared... yes
checking for strerror_r... yes
checking whether strerror_r returns char *... no
checking for mode_t... yes
checking for sig_atomic_t... yes
checking for working fcntl.h... no (bad O_NOATIME)
checking for pid_t... yes
checking whether frexp() can be used without linking with libm... yes
checking whether alarm is declared... yes
checking whether long double and double are the same... no
checking whether stdin defaults to large file offsets... yes
checking whether fseeko is declared... yes
checking for fseeko... yes
checking whether fflush works on input streams... no
checking whether stat file-mode macros are broken... no
checking for nlink_t... yes
checking whether ftello is declared... yes
checking for ftello... yes
checking whether ftello works... yes
checking whether getdtablesize is declared... yes
checking for getopt.h... (cached) yes
checking for getopt_long_only... yes
checking whether getopt is POSIX compatible... no
checking whether getenv is declared... yes
checking for C/C++ restrict keyword... __restrict
checking for struct timeval... yes
checking for wide-enough struct timeval.tv_sec member... yes
checking where to find the exponent in a 'double'... word 1 bit 20
checking where to find the exponent in a 'float'... word 0 bit 23
checking whether byte ordering is bigendian... no
checking whether limits.h has ULLONG_WIDTH etc.... no
checking whether getc_unlocked is declared... yes
checking whether we are using the GNU C Library >= 2.1 or uClibc... no
checking for wchar_t... yes
checking for max_align_t... yes
checking whether NULL can be used in arbitrary expressions... yes
checking for multithread API to use... none
checking whether lstat correctly handles trailing slash... no
checking for a sed that does not truncate output... /usr/local/bin/sed
checking whether malloc, realloc, calloc are POSIX compliant... yes
checking for stdlib.h... (cached) yes
checking for GNU libc compatible malloc... yes
checking for mbstate_t... yes
checking for a traditional japanese locale... ja_JP.eucJP
checking for a transitional chinese locale... zh_CN.GB18030
checking for a french Unicode locale... fr_FR.UTF-8
checking for mmap... yes
checking for MAP_ANONYMOUS... yes
checking whether memchr works... yes
checking whether <limits.h> defines MIN and MAX... no
checking whether <sys/param.h> defines MIN and MAX... yes
checking for promoted mode_t type... int
checking for library containing posix_spawn... none required
checking for posix_spawn... yes
checking whether posix_spawn works... yes
checking whether posix_spawnattr_setschedpolicy is supported... no
checking whether posix_spawnattr_setschedparam is supported... no
checking for sigset_t... yes
checking for SIGPIPE... yes
checking for inline... inline
checking for uid_t in sys/types.h... yes
checking whether C symbols are prefixed with underscore at the linker level... yes
checking whether snprintf returns a byte count as in C99... yes
checking whether snprintf is declared... yes
checking for stdbool.h that conforms to C99... yes
checking for _Bool... yes
checking for wint_t... yes
checking whether wint_t is too small... no
checking whether stdint.h conforms to C99... yes
checking whether stdint.h predates C++11... no
checking whether stdint.h has UINTMAX_WIDTH etc.... no
checking whether strerror(0) succeeds... no
checking whether strndup is declared... yes
checking whether strnlen is declared... yes
checking whether strsignal is declared... yes
checking whether sys_siglist is declared... yes
checking whether strstr works... yes
checking whether ldexp() can be used without linking with libm... yes
checking for struct timespec in <time.h>... yes
checking whether clearerr_unlocked is declared... yes
checking whether feof_unlocked is declared... yes
checking whether ferror_unlocked is declared... yes
checking whether fflush_unlocked is declared... no
checking whether fgets_unlocked is declared... no
checking whether fputc_unlocked is declared... no
checking whether fputs_unlocked is declared... no
checking whether fread_unlocked is declared... no
checking whether fwrite_unlocked is declared... no
checking whether getchar_unlocked is declared... yes
checking whether putc_unlocked is declared... yes
checking whether putchar_unlocked is declared... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for intmax_t... yes
checking for snprintf... (cached) yes
checking for strnlen... yes
checking for wcslen... yes
checking for wcsnlen... yes
checking for mbrtowc... (cached) yes
checking for wcrtomb... (cached) yes
checking whether _snprintf is declared... no
checking whether printf supports size specifiers as in C99... yes
checking whether printf supports 'long double' arguments... yes
checking whether printf supports infinite 'double' arguments... yes
checking whether printf supports infinite 'long double' arguments... yes
checking whether printf supports the 'a' and 'A' directives... yes
checking whether printf supports the 'F' directive... yes
checking whether printf supports the 'n' directive... no
checking whether printf supports the 'ls' directive... yes
checking whether printf supports the grouping flag... yes
checking whether printf supports the left-adjust flag correctly... yes
checking whether printf supports the zero flag correctly... yes
checking whether printf supports large precisions... yes
checking whether printf survives out-of-memory conditions... yes
checking whether to use C++... no
checking whether ungetc works on arbitrary bytes... yes
checking whether getcwd (NULL, 0) allocates memory for result... yes
checking for getcwd with POSIX signature... yes
checking for inttypes.h... (cached) yes
checking whether the inttypes.h PRIxNN macros are broken... no
checking for LC_MESSAGES... yes
checking for CFPreferencesCopyAppValue... yes
checking for CFLocaleCopyCurrent... yes
checking whether setenv is declared... yes
checking search.h usability... yes
checking search.h presence... yes
checking for search.h... yes
checking for tsearch... yes
checking whether strdup is declared... yes
checking whether unsetenv is declared... yes
checking for alloca as a compiler built-in... yes
checking whether to enable assertions... yes
checking whether btowc(0) is correct... yes
checking whether btowc(EOF) is correct... yes
checking for __builtin_expect... yes
checking whether sigaltstack is declared... yes
checking for stack_t... yes
checking whether // is distinct from /... (cached) no
checking whether dup2 works... yes
checking for error_at_line... no
checking whether fflush works on input streams... (cached) no
checking whether fcntl handles F_DUPFD correctly... yes
checking whether fcntl understands F_DUPFD_CLOEXEC... yes
checking whether fflush works on input streams... (cached) no
checking whether conversion from 'int' to 'long double' works... yes
checking whether fopen recognizes a trailing slash... yes
checking for __fpending... no
checking whether fpurge is declared... yes
checking whether fpurge works... no
checking whether frexp works... yes
checking whether frexpl is declared... yes
checking whether frexpl() can be used without linking with libm... yes
checking whether frexpl works... yes
checking for fseeko... (cached) yes
checking whether fflush works on input streams... (cached) no
checking for _fseeki64... no
checking for ftello... (cached) yes
checking whether ftello works... (cached) yes
checking whether getdtablesize works... yes
checking whether program_invocation_name is declared... no
checking whether program_invocation_short_name is declared... no
checking whether __argv is declared... no
checking whether __progname is defined in default libraries... yes
checking whether gettimeofday clobbers localtime buffer... no
checking for gettimeofday with POSIX signature... yes
checking whether isnan(double) can be used without linking with libm... yes
checking whether isnan(float) can be used without linking with libm... no
checking where to find the exponent in a 'float'... (cached) word 0 bit 23
checking whether isnan(long double) can be used without linking with libm... no
checking where to find the exponent in a 'long double'... word 2 bit 0
checking whether langinfo.h defines CODESET... yes
checking whether langinfo.h defines T_FMT_AMPM... yes
checking whether langinfo.h defines ERA... yes
checking whether langinfo.h defines YESEXPR... yes
checking for libsigsegv... (cached) no, consider installing GNU libsigsegv
checking whether locale.h conforms to POSIX:2001... yes
checking whether locale.h defines locale_t... no
checking whether struct lconv is properly defined... yes
checking whether lseek detects pipes... yes
checking whether NAN macro works... yes
checking whether HUGE_VAL works... yes
checking whether mbrtowc handles incomplete characters... yes
checking whether mbrtowc works as well as mbtowc... yes
checking whether mbrtowc handles a NULL pwc argument... yes
checking whether mbrtowc handles a NULL string argument... yes
checking whether mbrtowc has a correct return value... yes
checking whether mbrtowc returns 0 when parsing a NUL character... yes
checking whether mbrtowc works on empty input... yes
checking whether the C locale is free of encoding errors... yes
checking whether mbrtowc handles incomplete characters... (cached) yes
checking whether mbrtowc works as well as mbtowc... (cached) yes
checking for mkdtemp... yes
checking for working mkstemp... no
checking whether YESEXPR works... yes
checking for obstacks that work with any size object... no
checking whether open recognizes a trailing slash... no
checking whether posix_spawn_file_actions_addclose works... yes
checking whether posix_spawn_file_actions_adddup2 works... yes
checking whether posix_spawn_file_actions_addopen works... yes
checking whether frexp works... (cached) yes
checking whether ldexp can be used without linking with libm... (cached) yes
checking whether frexpl() can be used without linking with libm... (cached) yes
checking whether frexpl works... (cached) yes
checking whether frexpl is declared... (cached) yes
checking whether ldexpl() can be used without linking with libm... yes
checking whether ldexpl works... yes
checking whether ldexpl is declared... yes
checking whether program_invocation_name is declared... (cached) no
checking whether program_invocation_short_name is declared... (cached) no
checking for raise... yes
checking for sigprocmask... yes
checking for rawmemchr... no
checking whether readlink signature is correct... yes
checking whether readlink handles trailing slash correctly... no
checking for working re_compile_pattern... no
checking libintl.h usability... yes
checking libintl.h presence... yes
checking for libintl.h... yes
checking whether isblank is declared... yes
checking whether rename honors trailing slash on destination... no
checking whether rename honors trailing slash on source... no
checking whether rename manages hard links correctly... ln: conftest.f1: Operation not supported
guessing no
checking whether rename manages existing destinations correctly... yes
checking whether rmdir works... yes
checking for sched.h... yes
checking for struct sched_param... yes
checking for __secure_getenv... no
checking for issetugid... yes
checking for struct sigaction.sa_sigaction... yes
checking for volatile sig_atomic_t... yes
checking for sighandler_t... no
checking for signbit macro... yes
checking for signbit compiler built-ins... yes
checking for sigprocmask... (cached) yes
checking for stdint.h... (cached) yes
checking for SIZE_MAX... yes
checking for snprintf... (cached) yes
checking whether snprintf respects a size of 1... yes
checking whether printf supports POSIX/XSI format strings with positions... yes
checking for posix_spawnattr_t... yes
checking for posix_spawn_file_actions_t... yes
checking for ssize_t... yes
checking whether stat handles trailing slashes on directories... yes
checking whether stat handles trailing slashes on files... no
checking for va_copy... yes
checking for max_align_t... (cached) yes
checking whether NULL can be used in arbitrary expressions... (cached) yes
checking which flavor of printf attribute matches inttypes macros... system
checking for strchrnul... no
checking for working strndup... yes
checking for working strnlen... yes
checking for strsignal... yes
checking whether strsignal always returns a string... yes
checking whether strstr works in linear time... no
checking whether strstr works... (cached) yes
checking whether strtod obeys C99... yes
checking for nlink_t... (cached) yes
checking for ptrdiff_t... yes
checking for vasprintf... yes
checking for vasprintf... (cached) yes
checking for ptrdiff_t... (cached) yes
checking for waitid... yes
checking whether mbrtowc handles incomplete characters... (cached) yes
checking whether mbrtowc works as well as mbtowc... (cached) yes
checking whether wcrtomb return value is correct... yes
checking whether iswcntrl works... yes
checking for towlower... yes
checking for wctype_t... yes
checking for wctrans_t... yes
checking for stdint.h... (cached) yes
checking for a traditional french locale... (cached) fr_FR.ISO8859-1
checking for a french Unicode locale... (cached) fr_FR.UTF-8
checking for a traditional french locale... (cached) fr_FR.ISO8859-1
checking for a turkish Unicode locale... none
checking for closedir... yes
checking for dirfd... yes
checking whether dirfd is declared... yes
checking whether dirfd is a macro... no
checking whether dup works... yes
checking whether fdopen sets errno... yes
checking for flexible array member... yes
checking for getpagesize... yes
checking whether getpagesize is declared... yes
checking whether INT32_MAX < INTMAX_MAX... yes
checking whether INT64_MAX == LONG_MAX... yes
checking whether UINT32_MAX < UINTMAX_MAX... yes
checking whether UINT64_MAX == ULONG_MAX... yes
checking where to find the exponent in a 'double'... (cached) word 1 bit 20
checking where to find the exponent in a 'float'... (cached) word 0 bit 23
checking where to find the exponent in a 'long double'... (cached) word 2 bit 0
checking whether link obeys POSIX... yes
checking for setlocale... yes
checking for uselocale... yes
checking for getlocalename_l... no
checking for a traditional french locale... (cached) fr_FR.ISO8859-1
checking for a french Unicode locale... (cached) fr_FR.UTF-8
checking for a traditional japanese locale... (cached) ja_JP.eucJP
checking for a transitional chinese locale... (cached) zh_CN.GB18030
checking for a french Unicode locale... (cached) fr_FR.UTF-8
checking for mmap... (cached) yes
checking for MAP_ANONYMOUS... yes
checking for mmap... (cached) yes
checking for MAP_ANONYMOUS... yes
checking for a traditional french locale... (cached) fr_FR.ISO8859-1
checking for a french Unicode locale... (cached) fr_FR.UTF-8
checking for opendir... yes
checking for putenv compatible with GNU and SVID... no
checking whether _putenv is declared... no
checking for mmap... (cached) yes
checking for MAP_ANONYMOUS... yes
checking for mmap... (cached) yes
checking for MAP_ANONYMOUS... yes
checking for readdir... yes
checking whether setenv validates arguments... yes
checking for a traditional french locale... (cached) fr_FR.ISO8859-1
checking for a french Unicode locale... (cached) fr_FR.UTF-8
checking for a traditional japanese locale... (cached) ja_JP.eucJP
checking for a transitional chinese locale... (cached) zh_CN.GB18030
checking whether sleep is declared... yes
checking for working sleep... yes
checking for working stdalign.h... yes
checking for mmap... (cached) yes
checking for MAP_ANONYMOUS... yes
checking for mmap... (cached) yes
checking for MAP_ANONYMOUS... yes
checking whether symlink handles trailing slash correctly... no
checking for unsetenv... yes
checking for unsetenv() return type... int
checking whether unsetenv obeys POSIX... yes
checking for a traditional french locale... (cached) fr_FR.ISO8859-1
checking for a french Unicode locale... (cached) fr_FR.UTF-8
checking for a traditional japanese locale... (cached) ja_JP.eucJP
checking for a transitional chinese locale... (cached) zh_CN.GB18030
checking whether wctob works... yes
checking whether wctob is declared... yes
checking whether an open file can be renamed... yes
checking if changeword is wanted... no
checking which shell to use for syscmd... /bin/sh
checking if malloc debugging is wanted... no
configure: updating cache /Volumes/SAMSUNG/Devel/rudix/Ports/m4/config.cache
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating doc/Makefile
config.status: creating lib/Makefile
config.status: creating src/Makefile
config.status: creating tests/Makefile
config.status: creating checks/Makefile
config.status: creating examples/Makefile
config.status: creating lib/config.h
config.status: executing depfiles commands
config.status: executing stamp-h commands
configure: WARNING: unrecognized options: --enable-nls
make[1]: se entra en el directorio '/Volumes/SAMSUNG/Devel/rudix/Ports/m4/m4-build'
CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/sh /Volumes/SAMSUNG/Devel/rudix/Ports/m4/m4-build/build-aux/missing aclocal-1.15 -I m4
CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/sh /Volumes/SAMSUNG/Devel/rudix/Ports/m4/m4-build/build-aux/missing autoconf
 cd . && /bin/sh /Volumes/SAMSUNG/Devel/rudix/Ports/m4/m4-build/build-aux/missing automake-1.15 --gnu
/bin/sh ./config.status --recheck
running CONFIG_SHELL=/bin/sh /bin/sh ./configure --enable-nls --prefix=/usr/local --mandir=/usr/local/share/man --infodir=/usr/local/share/info --cache-file=/Volumes/SAMSUNG/Devel/rudix/Ports/m4/config.cache CFLAGS=-arch x86_64 -Os LDFLAGS=-arch x86_64 CPPFLAGS=-I/usr/local/include CXXFLAGS=-arch x86_64 -Os --no-create --no-recursion
./configure: line 1: syntax error near unexpected token `('
./configure: line 1: `m4trace:aclocal.m4:15: -1- m4_include([acinclude.m4])'
make[1]: *** [Makefile:1557: config.status] Error 2
make[1]: *** Se espera a que terminen otras tareas....
configure.ac: error: no proper invocation of AM_INIT_AUTOMAKE was found.
configure.ac: You should verify that configure.ac invokes AM_INIT_AUTOMAKE,
configure.ac: that aclocal.m4 is present in the top-level directory,
configure.ac: and that aclocal.m4 was recently regenerated (using aclocal)
automake-1.15: error: no 'Makefile.am' found for any configure output
automake-1.15: Did you forget AC_CONFIG_FILES([Makefile]) in configure.ac?
make[1]: *** [Makefile:1534: Makefile.in] Error 1
make[1]: se sale del directorio '/Volumes/SAMSUNG/Devel/rudix/Ports/m4/m4-build'
make: *** [../../Library/Rudix.mk:94: build] Error 2
paaguti commented 5 years ago

I think I found the answer...

https://github.com/Homebrew/homebrew-core/blob/master/Formula/m4.rb