btrfs-progs: build: add detection for more headers, types and functions

Add missing checks reported by autoscan. Reorder the sections, headers,
types and functions. Some of the reported issues are not fixed as
they're not critical.

Signed-off-by: David Sterba <[email protected]>

configure.ac

@@ -74,14 +74,6 @@ AC_CHECK_TOOL([AR], [ar])
 AC_PATH_PROG([RM], [rm], [rm])
 AC_PATH_PROG([RMDIR], [rmdir], [rmdir])
 
-
-AC_CHECK_FUNCS([openat], [],
-	[AC_MSG_ERROR([cannot find openat() function])])
-
-AC_CHECK_FUNCS([reallocarray])
-
-AC_CHECK_FUNCS([clock_gettime])
-
 AX_CHECK_DEFINE([features.h],[__GLIBC__],[HAVE_GLIBC=1],[HAVE_GLIBC=0])
 AC_SUBST([HAVE_GLIBC])
 
@@ -90,15 +82,97 @@ AX_GCC_BUILTIN([__builtin_sub_overflow])
 AX_GCC_BUILTIN([__builtin_mul_overflow])
 AX_GCC_BUILTIN([__builtin_cpu_supports__pclmul])
 
+AC_CHECK_HEADERS([fcntl.h])
+AC_CHECK_HEADERS([inttypes.h])
+AC_CHECK_HEADERS([malloc.h])
+AC_CHECK_HEADERS([mntent.h])
+AC_CHECK_HEADERS([stdint.h])
+AC_CHECK_HEADERS([strings.h])
+AC_CHECK_HEADERS([sys/file.h])
+AC_CHECK_HEADERS([sys/ioctl.h])
+AC_CHECK_HEADERS([sys/param.h])
+AC_CHECK_HEADERS([sys/socket.h])
+AC_CHECK_HEADERS([sys/statfs.h])
+AC_CHECK_HEADERS([sys/statvfs.h])
+AC_CHECK_HEADERS([sys/time.h])
+AC_CHECK_HEADERS([unistd.h])
+AC_CHECK_HEADER_STDBOOL
+
 AC_CHECK_HEADERS([linux/perf_event.h])
 AC_CHECK_HEADERS([linux/hw_breakpoint.h])
 AC_CHECK_HEADERS([linux/fsverity.h])
-AC_CHECK_HEADERS([printf.h])
+
+AC_CHECK_MEMBERS([struct stat.st_blksize])
+AC_CHECK_MEMBERS([struct stat.st_rdev])
+
+AC_TYPE_INT32_T
+AC_TYPE_INT64_T
+AC_TYPE_INT8_T
+AC_TYPE_MODE_T
+AC_TYPE_OFF_T
+AC_TYPE_PID_T
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UID_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_UINT8_T
+
+dnl Required functions
+AC_FUNC_CHOWN
+AC_FUNC_ERROR_AT_LINE
+AC_FUNC_FORK
+AC_FUNC_GETMNTENT
+AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
+AC_FUNC_MALLOC
+AC_FUNC_MMAP
+AC_FUNC_REALLOC
+
+AC_CHECK_FUNCS([openat
+	fchdir
+	fdatasync
+	ftruncate
+	getcwd
+	getmntent
+	getpagesize
+	gettimeofday
+	lchown
+	localtime_r
+	memchr
+	memmove
+	memset
+	mkdir
+	mkfifo
+	munmap
+	realpath
+	regcomp
+	rmdir
+	select
+	socket
+	strcasecmp
+	strchr
+	strdup
+	strerror
+	strncasecmp
+	strndup
+	strrchr
+	strstr
+	strtol
+	strtoul
+	strtoull
+	sysinfo
+	uname
+	], [], [AC_MSG_ERROR([cannot find required function])])
 
 dnl Check for printf.h functions.
+AC_CHECK_HEADERS([printf.h])
 AC_CHECK_FUNCS([register_printf_specifier])
 AC_CHECK_FUNCS([register_printf_modifier])
 
+dnl Optional (tests)
+AC_CHECK_FUNCS([clock_gettime])
+
 if grep -q 'HAVE_LINUX_FSVERITY_H.*1' confdefs.h; then
 	have_fsverity='yes'
 else