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author | André Draszik <andre.draszik@jci.com> | 2018-04-25 16:06:46 +0100 |
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committer | Richard Leitner <richard.leitner@skidata.com> | 2018-06-19 09:55:05 +0200 |
commit | 42c47497cf51deab3c9946c2e9e10d4d222e9dc9 (patch) | |
tree | a6213d47f0583cd11b08ef84d87c1c06e4488a3e | |
parent | bd6a2f1aad364553715ab6cb1eb47509396bddb2 (diff) | |
download | meta-java-42c47497cf51deab3c9946c2e9e10d4d222e9dc9.tar.gz |
docs: add bootstrap-flow.txt
Summarises the bootstrap of the java envrionment, rather than having
to find this described in some wiki page that was copied over from
OE-classic and never updated.
Signed-off-by: André Draszik <andre.draszik@jci.com>
Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
-rw-r--r-- | docs/bootstrap-flow.txt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/docs/bootstrap-flow.txt b/docs/bootstrap-flow.txt new file mode 100644 index 0000000..602eab7 --- /dev/null +++ b/docs/bootstrap-flow.txt | |||
@@ -0,0 +1,37 @@ | |||
1 | * first jikes-native is compiled | ||
2 | * a Java 1.4-capable compiler that does not need a runtime or | ||
3 | (strictly) a class library to work | ||
4 | * jikes-initial-native is a wrapper around it | ||
5 | |||
6 | * with this compiler we compile the initial (preliminary) | ||
7 | runtime (package virtual/java-initial-native) | ||
8 | * virtual/java-initial-native can be: cacao-initial-native (0.98) | ||
9 | or jamvm-initial-native (1.4.5) | ||
10 | * cacao is preferred, as it has a JIT, but doesn't compile | ||
11 | on all hosts | ||
12 | * cacao-initial-native and jamvm-initial-native both need | ||
13 | classpath-initial-native (0.93) and jikes-initial-native | ||
14 | |||
15 | * now libecj-bootstrap-native is built | ||
16 | * this needs jikes-initial-native virtual/java-initial-native | ||
17 | * now ecj-initial is built | ||
18 | * this needs libecj-bootstrap-native and | ||
19 | virtual/java-initial-native during runtime | ||
20 | * at that point we have a 1.5-capable compiler (ecj-initial) | ||
21 | running on a Java 1.4 compatible VM (cacao-inital-native | ||
22 | or jamvm-initial-native) | ||
23 | |||
24 | * with this compiler (ecj-initial), we compile the final runtime | ||
25 | and compiler (virtual/java-native and virtual/javac-native) | ||
26 | * virtual/java-native can be: cacao-native (1.6.1) or | ||
27 | jamvm-native (2.0.0~pre) | ||
28 | * cacao vs jamvm as above | ||
29 | * cacao-native and jamvm-native both need | ||
30 | classpath-initial-native (0.93) and classpath-native (0.99) | ||
31 | and ecj-initial-native and virtual/java-initial-native | ||
32 | * virtual/javac-native can be: ecj-bootstrap-native | ||
33 | * ecj-bootstrap-native needs libecj-bootstrap-native | ||
34 | and virtual/java-native | ||
35 | * at that point we have a 1.5-capable compiler (ecj-bootstrap-native) | ||
36 | running on a Java 1.5 compatible VN (cacao-native or | ||
37 | jamvm-native) | ||