patches/duma/2_5_15/100-cross-compile.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Sep 12 23:51:25 2010 +0200 (2010-09-12)
changeset 2123 ff2181adbd28
parent 572 944e145f3890
permissions -rw-r--r--
cc/gcc: disable complibs if not selected

Force gcc to not link with some companion libraries when
there are not needed (because selected-out).

There is no option to tell gcc *not* to build the Graphite and/or
LTO stuff. They *will* be built if gcc finds the suitable companion
libraries. If we do not provide them, but the host has them, then
gcc *will* find them, and link with them.

Consider the following:
- host has suitable PPL and CLooG (eg. Debian Squeeze)
- user wants to build gcc>=4.4
- user de-selects GRAPHITE
- gcc will find the hosts PPL and CLooG, and will use them
- the user moves the toolchain to an older host that does
not have them (eg. Debian Lenny)
- the toolchain fails, when it was properly setup not to

So, explicitly tell gcc *not* to use unneeded companion libs.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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diff -durN duma_2_5_15.orig/GNUmakefile duma_2_5_15/GNUmakefile
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--- duma_2_5_15.orig/GNUmakefile	2008-08-03 21:22:38.000000000 +0200
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+++ duma_2_5_15/GNUmakefile	2009-06-19 15:32:23.000000000 +0200
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@@ -93,10 +93,6 @@
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 # also define 'WIN32'
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 # some defaults:
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-CC=gcc
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-CXX=g++
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-AR=ar
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-RANLIB=ranlib
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 INSTALL=install
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 RM=rm
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 RMFORCE=rm -f
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@@ -471,7 +467,7 @@
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 createconf$(EXEPOSTFIX): createconf.o
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 	- $(RMFORCE) createconf$(EXEPOSTFIX)
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-	$(CC) $(CFLAGS) $(DUMA_OPTIONS) createconf.o -o createconf$(EXEPOSTFIX)
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+	$(HOSTCC) $(HOSTCFLAGS) $(DUMA_OPTIONS) createconf.o -o createconf$(EXEPOSTFIX)
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 tstheap$(EXEPOSTFIX): libduma.a tstheap.o
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 	- $(RMFORCE) tstheap$(EXEPOSTFIX)
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@@ -532,7 +528,7 @@
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 # define rules how to build objects for createconf
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 #
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 createconf.o:
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-	$(CC) $(CFLAGS) $(DUMA_OPTIONS) -c createconf.c -o $@
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+	$(HOSTCC) $(HOSTCFLAGS) $(DUMA_OPTIONS) -c createconf.c -o $@
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 #