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View Code? Open in Web Editor NEWWrite C shims from within Lean code.
License: Apache License 2.0
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xubaiw yatima-inc anderssorby iacore utensil eviefp badly-drawn-wizards mhuisi mattrobball hargonixlean4-alloy's Issues
Link Library
Hi, alloy sounds nice!
I wonder, how does one link a library -- in particular, with gcc for example, I would add the flag -lsqlite3 to link the library and make its symbols available. How would I add a -l flag using alloy?
For example
sudo apt install sqlite3-dev
import Alloy.C
open scoped Alloy.C
alloy c include <lean/lean.h> <sqlite3.h> <stdio.h>
alloy c extern
def sqliteversion : BaseIO UInt32 :=
printf("%s\n", sqlite3_libversion())
return lean_io_result_mk_ok(lean_box(0))$ lake build
...
error: stderr:
ld.lld: error: undefined symbol: sqlite3_libversion
>>> referenced by Sqlite.alloy.c:6 (./.lake/build/ir/Sqlite.alloy.c:6)
>>> ./.lake/build/ir/Sqlite.alloy.c.o:(_alloy_c_l_sqliteversion)
...
/home/dr/.elan/toolchains/leanprover--lean4---4.6.0/bin/lean: symbol lookup error: ./.lake/build/lib/libSqlite-1.so: undefined symbol: sqlite3_libversion
How to ensure that C_INCLUDE_PATH is respected by clangd started by Alloy?
My Lean4 LSP starts with a C_INCLUDE_PATH variable set. This is inherited by the clangd server started by alloy (checked through /proc/<clang-pid>/environ), but it doesn't pick up on the sqlite.h file in that include path.
If I edit a c file using the clangd LSP directly, it finds the header.
A lake build is fine though. 🤷
lake build does not rebuild alloy
It seems that if I change my .lean file (Seccomp.lean), it does not rebuild the .alloy.c. file. I can make it do so by deleting it explicitly.
Here, loogle is an executable using Seccomp, and Seccomp.lean has been changed:
~/build/lean/mathlib4 $ lake build loogle
[258/374] Building Seccomp
[372/374] Building Loogle.Main
~/build/lean/mathlib4 $ lake build +Seccomp:alloy.c
~/build/lean/mathlib4 $ rm ./build/ir/Seccomp.alloy.c
~/build/lean/mathlib4 $ lake build +Seccomp:alloy.c
Generating Seccomp alloy
~/build/lean/mathlib4 $ lake build loogle
[370/374] Compiling Seccomp alloy
[371/374] Linking Seccomp
[372/374] Building Loogle.Main
[374/374] Linking loogle
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