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Merged
hexdae merged 2 commits into from
Sep 13, 2025
Merged

Resolve libm relative to sysroot #82

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6e61e30
aarch64-none-linux-gnu: Resolve libm relative to sysroot
trnila Sep 13, 2025
3b0cd0a
arm-none-linux-gnueabihf: added test with libm
trnila Sep 13, 2025
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1 change: 1 addition & 0 deletions test/aarch64-none-linux-gnu/BUILD
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ cc_binary(
linkopts = [
"-nostartfiles",
"-Wl,--entry,main",
"-lm",
],
deps = [":arm_library"],
)
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5 changes: 5 additions & 0 deletions test/aarch64-none-linux-gnu/library.cpp
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
#include "library.h"
#include <vector>
#include <cmath>

uint16_t baz(uint8_t a) { return a * 2; }

Expand All @@ -13,3 +14,7 @@ uint16_t foobaz() {
vec.push_back(1);
return vec[0];
}

double math_fn(double val) {
return sin(val);
}
1 change: 1 addition & 0 deletions test/aarch64-none-linux-gnu/library.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,3 +3,4 @@
uint16_t baz(uint8_t var);
uint32_t foo(void);
uint16_t foobaz();
double math_fn(double val);
3 changes: 3 additions & 0 deletions test/aarch64-none-linux-gnu/main.cpp
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Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
// The simplest possible main function
#include "library.h"
#include <iostream>

int main(){
std::cout << math_fn(10) << "\n";
return 0;
}
3 changes: 3 additions & 0 deletions test/arm-none-linux-gnueabihf/BUILD
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Expand Up @@ -33,6 +33,9 @@ cc_binary(
"-mcpu=cortex-a5",
"-mthumb",
],
linkopts = [
"-lm",
],
deps = [":arm_library"],
)

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5 changes: 5 additions & 0 deletions test/arm-none-linux-gnueabihf/library.cpp
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
#include "library.h"
#include <vector>
#include <cmath>

uint16_t baz(uint8_t a) { return a * 2; }

Expand All @@ -13,3 +14,7 @@ uint16_t foobaz() {
vec.push_back(1);
return vec[0];
}

double math_fn(double val) {
return sin(val);
}
1 change: 1 addition & 0 deletions test/arm-none-linux-gnueabihf/library.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,3 +3,4 @@
uint16_t baz(uint8_t var);
uint32_t foo(void);
uint16_t foobaz();
double math_fn(double val);
3 changes: 3 additions & 0 deletions test/arm-none-linux-gnueabihf/main.cpp
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Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
// The simplest possible main function
#include "library.h"
#include <iostream>

int main(){
std::cout << math_fn(10) << "\n";
return 0;
}
9 changes: 9 additions & 0 deletions toolchain/patches/0001-Resolve-libc-relative-to-sysroot-aarch64_none_linux_gnu.patch
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Original file line number Diff line number Diff line change
Expand Up @@ -14,3 +14,12 @@ relative to the library search directories.
OUTPUT_FORMAT(elf64-littleaarch64)
-GROUP ( /lib64/libc.so.6 /usr/lib64/libc_nonshared.a AS_NEEDED ( /lib/ld-linux-aarch64.so.1 ) )
+GROUP ( =/lib64/libc.so.6 =/usr/lib64/libc_nonshared.a AS_NEEDED ( =/lib/ld-linux-aarch64.so.1 ) )

--- a/aarch64-none-linux-gnu/libc/usr/lib64/libm.so
+++ b/aarch64-none-linux-gnu/libc/usr/lib64/libm.so
@@ -1,4 +1,4 @@
/* GNU ld script
*/
OUTPUT_FORMAT(elf64-littleaarch64)
-GROUP ( /lib64/libm.so.6 AS_NEEDED ( /lib64/libmvec.so.1 ) )
+GROUP ( =/lib64/libm.so.6 AS_NEEDED ( =/lib64/libmvec.so.1 ) )
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