아래와 같은 m4 빌드 에러는 우분투 18.04 이상 버전을 사용할 경우 발생한다.
| ../../m4-1.4.17/lib/freadahead.c: In function ‘freadahead’: | ../../m4-1.4.17/lib/freadahead.c:91:3: error: #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib." | 91 | #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib." | | ^~~~~ | make[3]: *** [Makefile:1842: freadahead.o] Error 1 | make[3]: *** Waiting for unfinished jobs.... | ../../m4-1.4.17/lib/fseeko.c: In function ‘rpl_fseeko’: | ../../m4-1.4.17/lib/fseeko.c:109:4: error: #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib." | 109 | #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib." | | ^~~~~ | make[3]: *** [Makefile:1842: fseeko.o] Error 1 ...
_IO_ftrylockfile 옵션이 GCC7부터 삭제되어 발생한 문제이며, _IO_EOF_SEEN 옵션으로 변경하면 해결할 수 있다.
diff -Nura host-m4-1.4.17_old/lib/fflush.c host-m4-1.4.17_new/lib/fflush.c --- host-m4-1.4.17_old/lib/fflush.c 2013-09-22 15:15:20.000000000 +0900 +++ host-m4-1.4.17_new/lib/fflush.c 2020-05-30 21:04:10.383906871 +0900 @@ -33,7 +33,7 @@ #undef fflush -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ /* Clear the stream's ungetc buffer, preserving the value of ftello (fp). */ static void @@ -71,7 +71,7 @@ #endif -#if ! (defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */) +#if ! (defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */) # if (defined __sferror || defined __DragonFly__) && defined __SNPT /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */ @@ -145,7 +145,7 @@ if (stream == NULL || ! freading (stream)) return fflush (stream); -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ clear_ungetc_buffer_preserving_position (stream); diff -Nura host-m4-1.4.17_old/lib/fpurge.c host-m4-1.4.17_new/lib/fpurge.c --- host-m4-1.4.17_old/lib/fpurge.c 2013-09-22 15:15:20.000000000 +0900 +++ host-m4-1.4.17_new/lib/fpurge.c 2020-05-30 21:04:45.575543668 +0900 @@ -61,7 +61,7 @@ /* Most systems provide FILE as a struct and the necessary bitmask in <stdio.h>, because they need it for implementing getc() and putc() as fast macros. */ -# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ fp->_IO_read_end = fp->_IO_read_ptr; fp->_IO_write_ptr = fp->_IO_write_base; /* Avoid memory leak when there is an active ungetc buffer. */ diff -Nura host-m4-1.4.17_old/lib/freadahead.c host-m4-1.4.17_new/lib/freadahead.c --- host-m4-1.4.17_old/lib/freadahead.c 2013-09-22 15:15:20.000000000 +0900 +++ host-m4-1.4.17_new/lib/freadahead.c 2020-05-30 21:00:08.606540606 +0900 @@ -25,7 +25,7 @@ size_t freadahead (FILE *fp) { -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ if (fp->_IO_write_ptr > fp->_IO_write_base) return 0; return (fp->_IO_read_end - fp->_IO_read_ptr) diff -Nura host-m4-1.4.17_old/lib/freading.c host-m4-1.4.17_new/lib/freading.c --- host-m4-1.4.17_old/lib/freading.c 2013-09-22 15:15:20.000000000 +0900 +++ host-m4-1.4.17_new/lib/freading.c 2020-05-30 21:03:45.696164271 +0900 @@ -31,7 +31,7 @@ /* Most systems provide FILE as a struct and the necessary bitmask in <stdio.h>, because they need it for implementing getc() and putc() as fast macros. */ -# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ return ((fp->_flags & _IO_NO_WRITES) != 0 || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0 && fp->_IO_read_base != NULL)); diff -Nura host-m4-1.4.17_old/lib/fseeko.c host-m4-1.4.17_new/lib/fseeko.c --- host-m4-1.4.17_old/lib/fseeko.c 2013-09-22 15:15:55.000000000 +0900 +++ host-m4-1.4.17_new/lib/fseeko.c 2020-05-30 21:02:24.749025027 +0900 @@ -47,7 +47,7 @@ #endif /* These tests are based on fpurge.c. */ -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ if (fp->_IO_read_end == fp->_IO_read_ptr && fp->_IO_write_ptr == fp->_IO_write_base && fp->_IO_save_base == NULL) @@ -121,7 +121,7 @@ return -1; } -#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ +#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ fp->_flags &= ~_IO_EOF_SEEN; fp->_offset = pos; #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */ diff -Nura host-m4-1.4.17_old/lib/stdio-impl.h host-m4-1.4.17_new/lib/stdio-impl.h --- host-m4-1.4.17_old/lib/stdio-impl.h 2013-09-22 15:20:02.000000000 +0900 +++ host-m4-1.4.17_new/lib/stdio-impl.h 2020-05-30 21:11:15.965671007 +0900 @@ -18,6 +18,12 @@ the same implementation of stdio extension API, except that some fields have different naming conventions, or their access requires some casts. */ +/* Glibc 2.28 made _IO_IN_BACKUP private. For now, work around this + problem by defining it ourselves. FIXME: Do not rely on glibc + internals. */ +#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN +# define _IO_IN_BACKUP 0x100 +#endif /* BSD stdio derived implementations. */
우분투가 판올림되면 GCC 및 각종 라이브러리가 업데이트 되기 때문에 크로스컴파일을 해야하는 환경이라면 가급적 우분투 판올림을 조심스럽게 진행해야 한다. 진심으로...