build: Don't cross-compile GLSL builtin compiler

The builtin_compiler binary is used during the build process to generate
code for the builtin GLSL functions. Since this binary needs to be run
on the build host, it must not be cross-compiled.

This patch fixes the build system to compile a second version of the
source files and the builtin_compiler binary itself for the build
system. It does so by defining the CC_FOR_BUILD and CXX_FOR_BUILD
variables, which are searched for by the configure script and point to
the location of native C and C++ compilers.

In order for this to work properly, builtin_function.cpp is removed
from BUILT_SOURCES, otherwise the build system would try to generate it
before having had a chance to descend into the builtin_compiler
subdirectory. With the builtin_compiler and glsl_compiler now being
generated at different stages, the build instructions for glsl_compiler
can be simplified a bit.

Signed-off-by: Thierry Reding <[email protected]>
Acked-by: Kenneth Graunke <[email protected]>

3 files changed, 112 insertions, 0 deletions

diff --git a/src/glsl/builtin_compiler/.gitignore b/src/glsl/builtin_compiler/.gitignore
new file mode 100644
index 00000000000..40c551baa22
--- /dev/null
+++ b/src/glsl/builtin_compiler/.gitignore
@@ -0,0 +1,6 @@
+builtin_compiler
+glcpp-lex.c
+glcpp-parse.c
+glcpp-parse.h
+glcpp-parse.output
+/Makefile
diff --git a/src/glsl/builtin_compiler/Makefile.am b/src/glsl/builtin_compiler/Makefile.am
new file mode 100644
index 00000000000..eeac4245d83
--- /dev/null
+++ b/src/glsl/builtin_compiler/Makefile.am
@@ -0,0 +1,67 @@
+# Copyright © 2012 Jon TURNEY
+# Copyright © 2012 Thierry Reding
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+CC = @CC_FOR_BUILD@
+CFLAGS = @CFLAGS_FOR_BUILD@
+CPP = @CPP_FOR_BUILD@
+CPPFLAGS = @CPPFLAGS_FOR_BUILD@
+CXX = @CXX_FOR_BUILD@
+CXXFLAGS = @CXXFLAGS_FOR_BUILD@
+LD = @LD_FOR_BUILD@
+LDFLAGS = @LDFLAGS_FOR_BUILD@
+
+AM_CFLAGS = \
+	-I $(top_srcdir)/src/mapi \
+	-I $(top_srcdir)/src/mesa \
+	-I $(GLSL_SRCDIR) \
+	-I $(GLSL_SRCDIR)/glcpp \
+	$(DEFINES_FOR_BUILD)
+
+AM_CXXFLAGS = $(AM_CFLAGS)
+
+AM_YFLAGS = -v -d -p "glcpp_parser_"
+AM_LFLAGS = --nounistd -o$(LEX_OUTPUT_ROOT).c
+
+include ../Makefile.sources
+
+noinst_PROGRAMS = builtin_compiler
+
+builtin_compiler_SOURCES = \
+	$(GLSL_SRCDIR)/glcpp/glcpp-lex.l \
+	$(GLSL_SRCDIR)/glcpp/glcpp-parse.y \
+	$(LIBGLCPP_FILES) \
+	$(GLSL_SRCDIR)/glsl_lexer.ll \
+	$(GLSL_SRCDIR)/glsl_parser.cc \
+	$(LIBGLSL_FILES) \
+	$(LIBGLSL_CXX_FILES) \
+	$(top_srcdir)/src/mesa/program/hash_table.c \
+	$(top_srcdir)/src/mesa/program/symbol_table.c \
+	$(GLSL_COMPILER_CXX_FILES) \
+	builtin_stubs.cpp
+
+BUILT_SOURCES = \
+	glcpp-lex.c \
+	glcpp-parse.c \
+	glcpp-parse.h \
+	glsl_lexer.cc
+
+CLEANFILES = $(BUILT_SOURCES)
diff --git a/src/glsl/builtin_compiler/builtin_stubs.cpp b/src/glsl/builtin_compiler/builtin_stubs.cpp
new file mode 100644
index 00000000000..dfa5d324e7f
--- /dev/null
+++ b/src/glsl/builtin_compiler/builtin_stubs.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include "glsl_parser_extras.h"
+
+/* A dummy file.  When compiling prototypes, we don't care about builtins.
+ * We really don't want to half-compile builtin_functions.cpp and fail, though.
+ */
+void
+_mesa_glsl_release_functions(void)
+{
+}
+
+void
+_mesa_glsl_initialize_functions(_mesa_glsl_parse_state *state)
+{
+   (void) state;
+}