waf, PYTHONHASHSEED & -I order on other architectures

[Michael Tokarev]

Hi!

I'm having a build failure of samba on sparc64.  It fails due to finding
wrong include for <gssapi/gssapi.h>, as it has already seen before due to
PYTHONHASHSEED not being set, having python hashes in random order so -I
includes were unpredictable.

The good -I order is this:

  -Ithird_party/heimdal/lib/gssapi
  -Ithird_party/heimdal/lib

the bad is:

  -Ithird_party/heimdal/lib
  -Ithird_party/heimdal/lib/gssapi

(I picked up only the -I options for dirs where <gssapi/gssapi.h> exists).

This is stable on sparc64, all builds of samba-4.16 are failing due to
this very issue.

How to work around this?

The complete example command lines for both cases (compiling randomly picked
file krb5tgs.c) are below, the good and the bad ones.

Thanks,

/mjt

---
good:
/usr/bin/gcc -D_SAMBA_BUILD_=4 -DHAVE_CONFIG_H=1 -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security 
-MMD -D_GNU_SOURCE=1 -D_XOPEN_SOURCE_EXTENDED=1 -DHAVE_CONFIG_H=1 -fPIC -D__STDC_WANT_LIB_EXT1__=1 -D_REENTRANT 
-DCTDB_HELPER_BINDIR="/usr/libexec/ctdb" -DLOGDIR="/var/log/ctdb" -DCTDB_DATADIR="/usr/share/ctdb" -DCTDB_ETCDIR="/etc/ctdb" 
-DCTDB_VARDIR="/var/lib/ctdb" -DCTDB_RUNDIR="/var/run/ctdb" -fstack-protector-strong -fstack-clash-protection -Wno-error=discarded-qualifiers 
-Wno-error=cast-qual -Wno-error=missing-field-initializers -Wno-error=shadow -Wno-error=implicit-fallthrough -Wno-error=enum-compare 
-Wno-error=unused-but-set-variable -Wno-error=unused-const-variable -Wno-error=unused-variable -Wno-error=unused-result -DSTATIC_kdc_MODULES=NULL 
-DSTATIC_kdc_MODULES_PROTO=extern void __kdc_dummy_module_proto(void) -Ithird_party/heimdal_build -I../../third_party/heimdal_build 
-Ithird_party/heimdal/kdc -I../../third_party/heimdal/kdc -Iinclude/public -I../../include/public -Isource4 -I../../source4 -Ilib -I../../lib 
-Isource4/lib -I../../source4/lib -Isource4/include -I../../source4/include -Iinclude -I../../include -Ilib/replace -I../../lib/replace -Ictdb/include 
-I../../ctdb/include -Ictdb -I../../ctdb -I. -I../.. -Ithird_party/heimdal/lib/asn1 -I../../third_party/heimdal/lib/asn1 
-Ithird_party/heimdal/lib/gss_preauth -I../../third_party/heimdal/lib/gss_preauth -Ithird_party/heimdal/lib/base -I../../third_party/heimdal/lib/base 
-Ithird_party/heimdal/include -I../../third_party/heimdal/include -Ithird_party/heimdal/lib/krb5 -I../../third_party/heimdal/lib/krb5 
-Ithird_party/heimdal/lib/gssapi -I../../third_party/heimdal/lib/gssapi -Ithird_party/heimdal/lib/wind -I../../third_party/heimdal/lib/wind 
-Ithird_party/heimdal/lib/hx509 -I../../third_party/heimdal/lib/hx509 -Ithird_party/heimdal/lib/hdb -I../../third_party/heimdal/lib/hdb 
-Ithird_party/heimdal/lib/ntlm -I../../third_party/heimdal/lib/ntlm -Ithird_party/heimdal/lib/roken -I../../third_party/heimdal/lib/roken 
-Ithird_party/heimdal_build/include -I../../third_party/heimdal_build/include -Ithird_party/heimdal/lib/gssapi/gssapi 
-I../../third_party/heimdal/lib/gssapi/gssapi -Ithird_party/heimdal/lib/gssapi/spnego -I../../third_party/heimdal/lib/gssapi/spnego 
-Ithird_party/heimdal/lib/gssapi/krb5 -I../../third_party/heimdal/lib/gssapi/krb5 -Ithird_party/heimdal/lib/gssapi/mech 
-I../../third_party/heimdal/lib/gssapi/mech -Ithird_party/heimdal/lib/hcrypto -I../../third_party/heimdal/lib/hcrypto -Ithird_party/heimdal/lib 
-I../../third_party/heimdal/lib -Ithird_party/heimdal/lib/hcrypto/libtommath -I../../third_party/heimdal/lib/hcrypto/libtommath 
-Ithird_party/heimdal/lib/com_err -I../../third_party/heimdal/lib/com_err -Ithird_party/heimdal/lib/ipc -I../../third_party/heimdal/lib/ipc 
../../third_party/heimdal/kdc/krb5tgs.c -c -o/<<PKGBUILDDIR>>/bin/default/third_party/heimdal/kdc/krb5tgs.c.14.o -Wdate-time -D_FORTIFY_SOURCE=2


bad:
/usr/bin/gcc -D_SAMBA_BUILD_=4 -DHAVE_CONFIG_H=1 -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security 
-MMD -D_GNU_SOURCE=1 -D_XOPEN_SOURCE_EXTENDED=1 -DHAVE_CONFIG_H=1 -fPIC -D__STDC_WANT_LIB_EXT1__=1 -D_REENTRANT 
-DCTDB_HELPER_BINDIR="/usr/libexec/ctdb" -DLOGDIR="/var/log/ctdb" -DCTDB_DATADIR="/usr/share/ctdb" -DCTDB_ETCDIR="/etc/ctdb" 
-DCTDB_VARDIR="/var/lib/ctdb" -DCTDB_RUNDIR="/var/run/ctdb" -fstack-protector-strong -fstack-clash-protection -Wno-error=discarded-qualifiers 
-Wno-error=cast-qual -Wno-error=missing-field-initializers -Wno-error=shadow -Wno-error=implicit-fallthrough -Wno-error=enum-compare 
-Wno-error=unused-but-set-variable -Wno-error=unused-const-variable -Wno-error=unused-variable -Wno-error=unused-result -DSTATIC_kdc_MODULES=NULL 
-DSTATIC_kdc_MODULES_PROTO=extern void __kdc_dummy_module_proto(void) -Ithird_party/heimdal_build -I../../third_party/heimdal_build 
-Ithird_party/heimdal/kdc -I../../third_party/heimdal/kdc -Iinclude/public -I../../include/public -Isource4 -I../../source4 -Ilib -I../../lib 
-Isource4/lib -I../../source4/lib -Isource4/include -I../../source4/include -Iinclude -I../../include -Ilib/replace -I../../lib/replace -Ictdb/include 
-I../../ctdb/include -Ictdb -I../../ctdb -I. -I../.. -Ithird_party/heimdal/lib/krb5 -I../../third_party/heimdal/lib/krb5 
-Ithird_party/heimdal/lib/asn1 -I../../third_party/heimdal/lib/asn1 -Ithird_party/heimdal/include -I../../third_party/heimdal/include 
-Ithird_party/heimdal/lib/gssapi/gssapi -I../../third_party/heimdal/lib/gssapi/gssapi -Ithird_party/heimdal/lib/gssapi/spnego 
-I../../third_party/heimdal/lib/gssapi/spnego -Ithird_party/heimdal/lib/gssapi/krb5 -I../../third_party/heimdal/lib/gssapi/krb5 
-Ithird_party/heimdal/lib/gssapi/mech -I../../third_party/heimdal/lib/gssapi/mech -Ithird_party/heimdal/lib/ntlm -I../../third_party/heimdal/lib/ntlm 
-Ithird_party/heimdal/lib/hcrypto/libtommath -I../../third_party/heimdal/lib/hcrypto/libtommath -Ithird_party/heimdal/lib/com_err 
-I../../third_party/heimdal/lib/com_err -Ithird_party/heimdal/lib/hcrypto -I../../third_party/heimdal/lib/hcrypto -Ithird_party/heimdal/lib 
-I../../third_party/heimdal/lib -Ithird_party/heimdal/lib/wind -I../../third_party/heimdal/lib/wind -Ithird_party/heimdal/lib/hdb 
-I../../third_party/heimdal/lib/hdb -Ithird_party/heimdal/lib/roken -I../../third_party/heimdal/lib/roken -Ithird_party/heimdal_build/include 
-I../../third_party/heimdal_build/include -Ithird_party/heimdal/lib/hx509 -I../../third_party/heimdal/lib/hx509 -Ithird_party/heimdal/lib/ipc 
-I../../third_party/heimdal/lib/ipc -Ithird_party/heimdal/lib/gssapi -I../../third_party/heimdal/lib/gssapi -Ithird_party/heimdal/lib/gss_preauth 
-I../../third_party/heimdal/lib/gss_preauth -Ithird_party/heimdal/lib/base -I../../third_party/heimdal/lib/base 
../../third_party/heimdal/kdc/krb5tgs.c -c -o/<<PKGBUILDDIR>>/bin/default/third_party/heimdal/kdc/krb5tgs.c.14.o -Wdate-time -D_FORTIFY_SOURCE=2