diff options
| -rw-r--r-- | Makefile.in | 8 | ||||
| -rw-r--r-- | README | 126 |
2 files changed, 72 insertions, 62 deletions
diff --git a/Makefile.in b/Makefile.in index a3e58d4..64353db 100644 --- a/Makefile.in +++ b/Makefile.in @@ -62,11 +62,13 @@ all: Makefile all.$(backend) install: install.$(backend) -all.mcode: ghdl.mcode libs.vhdl.mcode +check: check.$(backend) Makefile: $(srcdir)/Makefile.in ./config.status +all.mcode: ghdl.mcode libs.vhdl.mcode + GRTSRCDIR=$(srcdir)/src/grt include $(GRTSRCDIR)/Makefile.inc @@ -208,7 +210,7 @@ install.vhdl.srcs: done install.vhdl.mcode: install.dirs #libs.vhdl.mcode -# Create library dirs +# Copy libraries and relocate source files. for d in v08/ieee v08/std v87/ieee v87/std v87/synopsys \ v93/ieee v93/mentor v93/std v93/synopsys; do \ $(MKDIR) -p $(DESTDIR)$(VHDL_LIB_DIR)/$$d; \ @@ -221,7 +223,7 @@ install.vhdl.mcode: install.dirs #libs.vhdl.mcode done install.program: install.dirs ghdl.mcode - $(INSTALL_PROGRAM) ghdl $(bindir) + $(INSTALL_PROGRAM) ghdl $(DESTDIR)$(bindir) install.mcode: install.program install.vhdl.srcs install.vhdl.mcode @@ -1,67 +1,75 @@ This directory contains the sources of GHDL, the VHDL simulator. +GHDL fully supports IEEE 1076-1987, IEEE 1076-1993, IEE 1076-2002 and +partially the 1076-2008 version of VHDL. + GHDL is free software. See the file COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. -### Creating a source tar. ### -############################## - -GHDL requires GCC to be compiled. The exact version of GCC is defined in -./translate/gcc/dist.sh, in the GCCVERSION= line. Do not try to change the -version, this may not compile or create a buggy compiler. - -The GHDL sources provided on http://ghdl.free.fr do not exactly match the -files hierarchy here. The later are used to directly build a compiler and -follow what GCC expect, while the former are used to do development and -are more logically organized. - -Use the ./translate/gcc/dist.sh script to create sources to be included in GCC: -$ cd translate/gcc -$ ./dist.sh sources -# This generates a ghdl-VERSION.tar.bz2 file. - - -### Compiling for development. ### -################################### - -These steps can make GHDL development hard. You can avoid to compile GCC -everytime. To do this, edit ortho/gcc/Makefile and set two variables: -AGCC_GCCSRC_DIR is the GCC sources directory, while AGCC_GCCOBJ_DIR is where -you have compiled GCC+GHDL once. Then, you can compile: -the GHDL back-end (ghdl1) in ./translate: - $ make BE=gcc -the GHDL driver in ./translate/ghdldrv: - $ make ghdl_gcc -the VHDL libraries (in ./translate/ghdldrv; you may need to slighly edit - Makefile to change the compiler): - $ ln -sf ghdl_gcc ghdl - $ make install.all -and the GHDL run-time (GRT) in ./translate/grt: - $ make -To use this GRT, you must create two links in translate/lib: - $ ln -s ../grt/grt.lst . - $ ln -s ../grt/libgrt.a . - -Once this is done, you can use the ghdl_gcc from translate/ghdldrv. - -### Compiling and using the debug back-end. ### -################################################ - -Debugging GHDL outputs can be very difficuly with the GCC back-end, since you -don't see the high level code generated by GHDL. To help debugging the -translator, I have written a debug back-end. This back-end is used instead of -the GCC back-end and displays pseudo-code (as well as declarations). This -pseudo-code can be then compiled with a reader. -To compile it, go to ./translate: - $ make BE=debug -This creates a ghdl1-debug. Then go to ./ortho/oread and compile the reader: - $ make BE=gcc -You can now use this chain by adding the '--post' option to the ghdl driver: - $ ghdl_gcc -a --post my_file.vhdl -This creates an intermediate file my_file.on, which is then compiled by - oread-gcc. - -Tristan. +Building GHDL (Short instructions) +********************************** + +You need GNAT for x86 (32 bits). See below for instructions + +$ ./configure +$ make + +At that place, you can already use the 'ghdl' built in the directory. +You can also install it: +$ make install + +That's all! + +Build GHDL (Long instructions) +****************************** + +GHDL supports many backend (code generator), so you first must choose +the backend you want to use. There are currently 3 supported backends: + +* gcc +* mcode (this is an internal code generator for i386) +* llvm (experimental) + +Here is a short comparaison: + +* gcc: ++ generated code is faster (particularly with -O or -O2) ++ generated code can be debugger (with -g) ++ the output is an executable ++ ported to many platforms (x86, x86_64, powerpc, sparc) +- analyze can takes time (particularly for big units) +- build is more complex + +* mcode ++ easy to build +- but i386 only ++ very quick analysis time ++ can analyze very big designs +- simulation is slower +- no executable created + +* llvm +- still experimental ++ same advantages of gcc (good generated code, debuggable) ++ easier to build than gcc + +As GCC is written in Ada, you need to use the GNU Ada compiler (GNAT). +I recommend to use GNAT GPL from http://libre.adacore.com (free). +If you build with the mcode backend, you need an i386 version of GNAT. + +* Building with mcode backend. +This is as simple as: +$ ./configure --prefix=PREFIX + where PREFIX is the directory for installation +$ make + This builds the ghdl executable, which can be used as is. +$ make install + To install within PREFIX + +* Building with the gcc backend +TODO +* Building with the llvm backend +TODO |