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authorTuomas Tynkkynen <tuomas@tuxera.com>2017-02-08T18·35+0200
committerTuomas Tynkkynen <tuomas@tuxera.com>2017-02-08T19·51+0200
commit2cd468874fe512387820bd47d23fa6351d069da2 (patch)
treec164b754bfee98cc719f4468ef496d9a76419b96 /src/libmain
parent81c53fe8e56f4a4ce10088fe2d7b6a524a6dc126 (diff)
Include config.h implicitly with '-include config.h' in CFLAGS
Because config.h can #define things like _FILE_OFFSET_BITS=64 and not
every compilation unit includes config.h, we currently compile half of
Nix with _FILE_OFFSET_BITS=64 and other half with _FILE_OFFSET_BITS
unset. This causes major havoc with the Settings class on e.g. 32-bit ARM,
where different compilation units disagree with the struct layout.

E.g.:

diff --git a/src/libstore/globals.cc b/src/libstore/globals.cc
@@ -166,6 +166,8 @@ void Settings::update()
     _get(useSubstitutes, "build-use-substitutes");
+    fprintf(stderr, "at Settings::update(): &useSubstitutes = %p\n", &nix::settings.useSubstitutes);
     _get(buildUsersGroup, "build-users-group");
diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -138,6 +138,8 @@ void RemoteStore::initConnection(Connection & conn)
 void RemoteStore::setOptions(Connection & conn)
 {
+    fprintf(stderr, "at RemoteStore::setOptions(): &useSubstitutes = %p\n", &nix::settings.useSubstitutes);
     conn.to << wopSetOptions

Gave me:

at Settings::update(): &useSubstitutes = 0xb6e5c5cb
at RemoteStore::setOptions(): &useSubstitutes = 0xb6e5c5c7

That was not a fun one to debug!
Diffstat (limited to 'src/libmain')
-rw-r--r--src/libmain/shared.cc2
-rw-r--r--src/libmain/stack.cc2
2 files changed, 0 insertions, 4 deletions
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 52cb2312826b..56aa3db00158 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -1,5 +1,3 @@
-#include "config.h"
-
 #include "common-args.hh"
 #include "globals.hh"
 #include "shared.hh"
diff --git a/src/libmain/stack.cc b/src/libmain/stack.cc
index abf59dc4baa6..57b6a197c0f0 100644
--- a/src/libmain/stack.cc
+++ b/src/libmain/stack.cc
@@ -1,5 +1,3 @@
-#include "config.h"
-
 #include "types.hh"
 
 #include <cstring>