MikePetullo:

The e2fsprogs package fails to build when I configure the OpenWrt build process to produce an image for x86/x86_64 using glibc. I am using OpenWrt master as of commit d1ea8ac.

From what I can tell, a number of the programs in e2fsprogs need to link against -lpthread when using glibc. However, several Makefiles (for example, e2fsck/Makefile) contain the following:

    LIBCOM_ERR = $(LIB)/libcom_err.so # -lpthread

It looks like the '#' character is a result of the definition of @PRIVATE_LIBS_CMT@ which autotools uses to transform MCONFIG.in into MCONFIG. This, in turn, seems to follow from the use of --enable-elf-shlibs in the OpenWrt package definition.

Here is the tail end of a failed build:

LD e2fsck

e2fsck.h:598:13: warning: type of 'fatal_error' does not match original declaration [-Wlto-type-mismatch]
extern void fatal_error(e2fsck_t ctx, const char * fmt_string);
^
util.c:53:6: note: 'fatal_error' was previously declared here
void fatal_error(e2fsck_t ctx, const char msg)
^
util.c:53:6: note: code may be misoptimized unless -fno-strict-aliasing is used
jfs_user.h:208:17: warning: type of 'e2fsck_global_ctx' does not match original declaration [-Wlto-type-mismatch]
extern e2fsck_t e2fsck_global_ctx; / Try your very best not to use this! */
^
e2fsck.h:221:31: note: type 'struct e2fsck_struct *' should match type 'struct e2fsck_struct *'
typedef struct e2fsck_struct e2fsck_t;
^
unix.c:68:10: note: 'e2fsck_global_ctx' was previously declared here
e2fsck_t e2fsck_global_ctx; / Try your very best not to use this! */
^
unix.c:68:10: note: code may be misoptimized unless -fno-strict-aliasing is used
../lib/libcom_err.so: undefined reference to sem_post' ../lib/libcom_err.so: undefined reference to sem_wait'
../lib/libcom_err.so: undefined reference to sem_init' ../lib/libcom_err.so: undefined reference to sem_destroy'
collect2: error: ld returned 1 exit status