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Subject[PATCH][RFC] Compile test script for exported header files
Date
Users of kernel header files would be happier if they did not contain
kernel specific parts and would contain #include statements for all
other header files that they depend on, and in general would compile.

For each header file exported to userspace, the script creates
a simple .c file which just includes the header file. Then it
tries to compile it and reports results.

Execute the script like this:

$ make headers_install
$ cd usr/include
$ ../../scripts/headers_compile_test.sh

Example statistics from 3.15.9 kernel:

152 files failed the compile test.
576 files passed the compile test.

Example error count from 3.15.9:

$ ../../scripts/headers_compile_test.sh 2>&1 | \
grep error: | sed -e 's/.*error://g' | sort | uniq -c | sort -rn

189 unknown type name ‘uint32_t’
103 unknown type name ‘size_t’
97 unknown type name ‘uint64_t’
43 unknown type name ‘__kernel_ulong_t’
36 unknown type name ‘uint8_t’
22 field ‘addr’ has incomplete type
18 field ‘tstamp’ has incomplete type
16 unknown type name ‘__kernel_time_t’
16 field ‘in’ has incomplete type
16 field ‘in6’ has incomplete type
14 unknown type name ‘__be16’
13 ‘IFNAMSIZ’ undeclared here (not in a function)
10 sys/time.h: No such file or directory
9 unknown type name ‘uint16_t’
9 field ‘ifru_netmask’ has incomplete type
9 field ‘ifru_hwaddr’ has incomplete type
9 field ‘ifru_dstaddr’ has incomplete type
9 field ‘ifru_broadaddr’ has incomplete type
9 field ‘ifru_addr’ has incomplete type
8 unknown type name ‘__kernel_pid_t’
7 unknown type name ‘u_short’
7 unknown type name ‘pid_t’
6 invalid application of ‘sizeof’ to incomplete type ‘struct timespec’
6 field ‘audio_tstamp’ has incomplete type
5 unknown type name ‘__kernel_long_t’
5 string.h: No such file or directory
5 requested alignment is not an integer constant
5 limits.h: No such file or directory
5 array type has incomplete element type
4 unknown type name ‘__kernel_uid32_t’
4 unknown type name ‘__kernel_gid32_t’
4 field ‘src’ has incomplete type
4 ‘ETH_ALEN’ undeclared here (not in a function)
3 unknown type name ‘caddr_t’
3 stdint.h: No such file or directory
3 ‘IPSET_ERR_TYPE_SPECIFIC’ undeclared here (not in a function)
3 field ‘trigger_tstamp’ has incomplete type
3 field ‘src_addr’ has incomplete type
3 field ‘smsk’ has incomplete type
3 field ‘sin_addr’ has incomplete type
3 field ‘laddr’ has incomplete type
3 field ‘id’ has incomplete type
3 field ‘bssid’ has incomplete type
3 expected specifier-qualifier-list before ‘uint64_t’
2 unknown type name ‘u_long’
2 unknown type name ‘stack_t’
2 unknown type name ‘sigset_t’
2 unknown type name ‘sa_family_t’
2 unknown type name ‘__kernel_mode_t’
2 unknown type name ‘__kernel_key_t’
2 unknown type name ‘int32_t’
2 unknown type name ‘elf_gregset_t’
2 unknown type name ‘bool’
2 unistd.h: No such file or directory
2 ‘uint64_t’ undeclared here (not in a function)
2 ‘true’ undeclared (first use in this function)
2 sys/ioctl.h: No such file or directory
2 stddef.h: No such file or directory
2 ‘__kernel_mode_t’ undeclared here (not in a function)
2 field ‘uc_mcontext’ has incomplete type
2 field ‘tmsk’ has incomplete type
2 field ‘tgt’ has incomplete type
2 field ‘shm_perm’ has incomplete type
2 field ‘sem_perm’ has incomplete type
2 field ‘raddr’ has incomplete type
2 field ‘msg_perm’ has incomplete type
2 field ‘grp’ has incomplete type
2 field ‘dst_addr’ has incomplete type
2 field ‘arp_pa’ has incomplete type
2 field ‘arp_netmask’ has incomplete type
2 field ‘arp_ha’ has incomplete type
2 ‘false’ undeclared (first use in this function)
2 endian.h: No such file or directory
1 xen/interface/xen.h: No such file or directory
1 via_drmclient.h: No such file or directory
1 unknown type name ‘wait_queue_head_t’
1 unknown type name ‘u_int8_t’
1 unknown type name ‘snd_seq_client_type_t’
1 unknown type name ‘int64_t’
1 unknown type name ‘int16_t’
1 unknown type name ‘ino_t’
1 unknown type name ‘elf_greg_t’
1 unknown type name ‘elf_fpxregset_t’
1 unknown type name ‘elf_fpregset_t’
1 unknown type name ‘__be32’
1 time.h: No such file or directory
1 ‘SIOCDEVPRIVATE’ undeclared here (not in a function)
1 ‘NULL’ undeclared (first use in this function)
1 netinet/in.h: No such file or directory
1 ‘MSG_FIN’ undeclared here (not in a function)
1 ‘MAX_IPOPTLEN’ undeclared here (not in a function)
1 ‘MAX_ADDR_LEN’ undeclared here (not in a function)
1 invalid application of ‘sizeof’ to incomplete type ‘struct sockaddr’
1 ‘IFHWADDRLEN’ undeclared here (not in a function)
1 field ‘vmask’ has incomplete type
1 field ‘vifc_rmt_addr’ has incomplete type
1 field ‘vifc_lcl_addr’ has incomplete type
1 field ‘vaddr’ has incomplete type
1 field ‘uc_chain’ has incomplete type
1 field ‘tgt_ip’ has incomplete type
1 field ‘tcp’ has incomplete type
1 field ‘sw_reserved’ has incomplete type
1 field ‘stamp’ has incomplete type
1 field ‘sspp_addr’ has incomplete type
1 field ‘ssp_addr’ has incomplete type
1 field ‘src_mask’ has incomplete type
1 field ‘src_ip’ has incomplete type
1 field ‘spt_address’ has incomplete type
1 field ‘spp_address’ has incomplete type
1 field ‘spinfo_address’ has incomplete type
1 field ‘spc_aaddr’ has incomplete type
1 field ‘sas_obs_rto_ipaddr’ has incomplete type
1 field ‘saddr’ has incomplete type
1 field ‘rtmsg_src’ has incomplete type
1 field ‘rtmsg_gateway’ has incomplete type
1 field ‘rtmsg_dst’ has incomplete type
1 field ‘rt_genmask’ has incomplete type
1 field ‘rt_gateway’ has incomplete type
1 field ‘rt_dst’ has incomplete type
1 field ‘real’ has incomplete type
1 field ‘prefix’ has incomplete type
1 field ‘obj_list’ has incomplete type
1 field ‘mfcc_origin’ has incomplete type
1 field ‘mfcc_mcastgrp’ has incomplete type
1 field ‘mf6cc_origin’ has incomplete type
1 field ‘mf6cc_mcastgrp’ has incomplete type
1 field ‘mask’ has incomplete type
1 field ‘ival2’ has incomplete type
1 field ‘ival1’ has incomplete type
1 field ‘iph’ has incomplete type
1 field ‘ip’ has incomplete type
1 field ‘ip6’ has incomplete type
1 field ‘im_src’ has incomplete type
1 field ‘im_dst’ has incomplete type
1 field ‘im6_src’ has incomplete type
1 field ‘im6_dst’ has incomplete type
1 field ‘gw’ has incomplete type
1 field ‘expected’ has incomplete type
1 field ‘dst_mask’ has incomplete type
1 field ‘dmsk’ has incomplete type
1 field ‘dest_addr’ has incomplete type
1 field ‘daddr’ has incomplete type
1 field ‘ap_addr’ has incomplete type
1 field ‘a6’ has incomplete type
1 field ‘a4’ has incomplete type
1 expected specifier-qualifier-list before ‘DECLARE_BITMAP’
1 expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘snd_seq_client_type_t’
1 #error "patchkey.h included directly"
1 drm.h: No such file or directory
1 ‘DLM_RESNAME_MAXLEN’ undeclared here (not in a function)

Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi>
---
scripts/headers_compile_test.sh | 48 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100755 scripts/headers_compile_test.sh

diff --git a/scripts/headers_compile_test.sh b/scripts/headers_compile_test.sh
new file mode 100755
index 0000000..57a60f6
--- /dev/null
+++ b/scripts/headers_compile_test.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+# bash due to arithmetics
+set -e
+set -u
+#set -x
+
+echo Simple compile test for header files meant for userspace.
+
+# sanity test
+if [ ! -d ./linux ]; then
+ echo Sanity check error: ./linux directory not found
+ echo Should be called in usr/include after \'make headers_install\'.
+ echo Returns number of failed files, 0 if none.
+ exit 1
+fi
+
+# For each header file, create a .c which just includes the header file
+# and try to compile it using only current directory for searching other
+# included header files.
+_FAILED=0
+_PASSED=0
+for f in $( find . -name "*\.h" | xargs ); do
+ _FAIL=0
+ CFILE=$( echo "$( dirname $f )/$( basename $f .h ).c" )
+
+ # create .c file
+ echo "#include <$( echo $f | sed -e 's|^.\/||' )>" \
+ > "$(dirname $f)/$(basename $f .h).c"
+
+ # compile test
+ cc -Wall -c -nostdinc -I . "$CFILE" \
+ || _FAIL=1
+
+ # report errors
+ if [ "$_FAIL" -gt 0 ]; then
+ echo "FAILED: $f"
+ _FAILED=$(( $_FAILED + 1 ))
+ else
+ echo "PASSED: $f"
+ _PASSED=$(( $_PASSED + 1))
+ fi
+done
+
+echo Statistics:
+echo $_FAILED files failed the compile test.
+echo $_PASSED files passed the compile test.
+
+exit $_FAILED
--
2.1.0
--
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