Update makefiles and README after merging in PDLs

As PDLs are now part of Pharo-ArchC repository, there's no need to check
out PDL. This commit updates makefiles and README accordingly.

There's one issue with RISC-V PDL as it uses to upsteam `riscv-opcodes`
to provide list of instructions and encodings. Technically it is an
submodule so a special care is needed to make sure it is checked out.
This is not a problem when one is using makefiles as they care for this,
but it is a problem when relying solely on Iceberg / Metacello to load
ArchC since there's no support for submodules.

README.md

@@ -27,19 +27,10 @@ Either use shortcut:
   1. Clone the repository
 
      ```
-     git clone https://github.com/shingarov/Pharo-ArchC ArchC
-     ```
-
-  2. Get PDLs:
-
-     ```
-     cd ArchC
-     ./get-pdls.sh
+     git clone --recurse-submodules https://github.com/shingarov/Pharo-ArchC ArchC
      ```
 
-     Alternatively, you may symlink `pdl` directory wherever you keep your PDLs
-
-  3. Download Pharo
+  2. Download Pharo
 
      ```
      mkdir ArchC/pharo
@@ -49,7 +40,7 @@ Either use shortcut:
      curl https://get.pharo.org/64/80+vm | bash
      ```
 
-  4. Load code into Pharo image:
+  3. Load code into Pharo image:
 
      ```
      ./pharo Pharo.image save archc
@@ -67,7 +58,7 @@ Either use shortcut:
  2. Clone the repository:
 
     ````
-    git clone https://github.com/shingarov/Pharo-ArchC.git.git
+    git clone --recurse-submodules https://github.com/shingarov/Pharo-ArchC.git.git
     ````
 
  3. In Smalltalk/X, execute:

pharo/GNUmakefile

@@ -16,12 +16,10 @@ MACHINEARITHMETIC_BRANCH ?= pure-z3
 $(eval $(call git-clone-local,MACHINEARITHMETIC_DIR,$(MACHINEARITHMETIC_URL),$(MACHINEARITHMETIC_BRANCH)))
 endif
 
-ifndef ARCHC_PDL_DIR
-ARCHC_PDL_DIR    := ../pdl
-ARCHC_PDL_URL    ?= https://github.com/janvrany/Pharo-ArchC-PDL.git
-ARCHC_PDL_BRANCH ?= master
-$(eval $(call git-clone-local,ARCHC_PDL_DIR,$(ARCHC_PDL_URL),$(ARCHC_PDL_BRANCH)))
-endif
+prereq:: ../pdl/riscv/riscv-opcodes/opcodes-rv32i
+
+../pdl/riscv/riscv-opcodes/opcodes-rv32i:
+	git submodule update --init --recursive $(dir $@)
 
 build: prereq $(PROJECT).image
 	@echo ""

stx/GNUmakefile

@@ -16,12 +16,10 @@ MACHINEARITHMETIC_BRANCH ?= pure-z3
 $(eval $(call git-clone-local,MACHINEARITHMETIC_DIR,$(MACHINEARITHMETIC_URL),$(MACHINEARITHMETIC_BRANCH)))
 endif
 
-ifndef ARCHC_PDL_DIR
-ARCHC_PDL_DIR    := ../pdl
-ARCHC_PDL_URL    ?= https://github.com/janvrany/Pharo-ArchC-PDL.git
-ARCHC_PDL_BRANCH ?= master
-$(eval $(call git-clone-local,ARCHC_PDL_DIR,$(ARCHC_PDL_URL),$(ARCHC_PDL_BRANCH)))
-endif
+prereq:: ../pdl/riscv/riscv-opcodes/opcodes-rv32i
+
+../pdl/riscv/riscv-opcodes/opcodes-rv32i:
+	git submodule update --init --recursive $(dir $@)
 
 build: prereq
 	@echo "To run Smalltalk/X with $(PROJECT) loaded, run:"