e2fsprogs: use ALL_CFLAGS to build gen_crc32ctable

With just BUILD_CFLAGS this we don't get the right include paths (i.e. within the tree) to build the gen_crc32ctable binary.

Signed-off-by Eric Sandeen <[email protected]>

Quoted 4 lines · Eric Sandeen

With just BUILD_CFLAGS this we don't get the right include paths (i.e. within the tree) to build the gen_crc32ctable binary.

Signed-off-by Eric Sandeen <[email protected]>

We can't use ALL_CFLAGS because in the cross compilation case, it might contain some compiler directives that make sense for the target platform, but not for the host platform. BUILD_CFLAGS is specifically designed for this case. For programs like gen_crc32ctable that need to compiled and run on the host OS, you have to do the following so the right thing happens when you are cross-compiling e2fsprogs (yes, there are people who do this!):

gen_crc32ctable: $(srcdir)/gen_crc32ctable.c

	$(E) "	CC $@"
	$(Q) $(BUILD_CC) $(BUILD_CFLAGS) -o gen_crc32ctable \
		$(srcdir)/gen_crc32ctable.c

Note the use of $(BUILD_CC) instead of $(CC).

The better fix is to note that gen_crc32ctable doesn't actually need anything from ext2fs.h, and move that #include to crc32c.c.

- Ted

commit 8232f2ddaece256afd323eb5a289a5ec1b7fbd1a

Author: Theodore Ts'o <[email protected]>
Date:   Mon Oct 3 22:49:45 2011 -0400

libext2fs: move #include "ext2fs.h" from crc32c_defs.h to crc32c.c

The byte swap functions which are defined in ext2fs.h are only needed by crc32.c, and not by gen_crc32ctable.c. The gen_crc32ctable program needs to be compiled on the host OS, where ext2fs.h may not be present. So move the use of the header function to crc32c.c, to avoid compilation problems.

Signed-off-by "Theodore Ts'o" <[email protected]>

lib/ext2fs/crc32c.c +0 -0

index 65bca5c..6be4336 100644

lib/ext2fs/crc32c.c +15 -0

+#define __constant_cpu_to_le32(x) ___constant_swab32((x))
+#define __constant_cpu_to_be32(x) (x)
+#define __be32_to_cpu(x) (x)
+#define __cpu_to_be32(x) (x)
+#define __cpu_to_le32(x) (ext2fs_cpu_to_le32((x)))
+#define __le32_to_cpu(x) (ext2fs_le32_to_cpu((x)))
+#else
+#define __constant_cpu_to_le32(x) (x)
+#define __constant_cpu_to_be32(x) ___constant_swab32((x))
+#define __be32_to_cpu(x) (ext2fs_be32_to_cpu((x)))
+#define __cpu_to_be32(x) (ext2fs_cpu_to_be32((x)))
+#define __cpu_to_le32(x) (x)
+#define __le32_to_cpu(x) (x)
+#endif
+
 #if CRC_LE_BITS > 8
 # define tole(x) (__force uint32_t) __constant_cpu_to_le32(x)
 #else

lib/ext2fs/crc32c_defs.h +0 -18

index ced4f67..023f2c0 100644
@@ -42,23 +42,6 @@
 		(((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))
 
 
-#include "ext2fs.h"
-#ifdef WORDS_BIGENDIAN
-#define __constant_cpu_to_le32(x) ___constant_swab32((x))
-#define __constant_cpu_to_be32(x) (x)
-#define __be32_to_cpu(x) (x)
-#define __cpu_to_be32(x) (x)
-#define __cpu_to_le32(x) (ext2fs_cpu_to_le32((x)))
-#define __le32_to_cpu(x) (ext2fs_le32_to_cpu((x)))
-#else
-#define __constant_cpu_to_le32(x) (x)
-#define __constant_cpu_to_be32(x) ___constant_swab32((x))
-#define __be32_to_cpu(x) (ext2fs_be32_to_cpu((x)))
-#define __cpu_to_be32(x) (ext2fs_cpu_to_be32((x)))
-#define __cpu_to_le32(x) (x)
-#define __le32_to_cpu(x) (x)
-#endif
-
 #if (__GNUC__ >= 3)
 #define likely(x)	__builtin_expect(!!(x), 1)
 #define unlikely(x)	__builtin_expect(!!(x), 0)
--

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On 10/3/11 10:02 PM, Ted Ts'o wrote:

Quoted 8 lines

lib/ext2fs/crc32c.c +0 -0

index 65bca5c..6be4336 100644
@@ -40,6 +40,23 @@
 #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
 #include "crc32c_defs.h"
 

lib/ext2fs/crc32c.c line 44

Quoted 2 lines

lib/ext2fs/crc32c.c +2 -0

+#include "ext2fs.h"
+#ifdef WORDS_BIGENDIAN

well, this has the exact same problem as originally reported, because we still don't have the include paths to find ext2fs.h in the tree, and it is still included via crc32c_defs.h

mv: cannot stat `t-es.gmo': No such file or directory
mv: cannot stat `t-ca.gmo': No such file or directorymake[2]: *** [es.gmo] Error 1

-Eric