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Issue 21488 - Always compile dmd with -fPIC on POSIX targets

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This commit is contained in:
Iain Buclaw 2021-07-02 00:15:46 +02:00 • committed by The Dlang Bot
parent d0406f3afe
commit ffcc851a89
5 changed files with 21 additions and 25 deletions
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4
ini/linux/bin32/dmd.conf
View file

@ -1,5 +1,5 @@
[Environment32]
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib32 -L--export-dynamic
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib32 -L--export-dynamic -fPIC
[Environment64]
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib64 -L--export-dynamic
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib64 -L--export-dynamic -fPIC

2
ini/linux/bin64/dmd.conf
View file

@ -1,5 +1,5 @@
[Environment32]
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib32 -L--export-dynamic
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib32 -L--export-dynamic -fPIC
[Environment64]
DFLAGS=-I%@P%/../../src/phobos -I%@P%/../../src/druntime/import -L-L%@P%/../lib64 -L--export-dynamic -fPIC

20
src/build.d
View file

@ -315,7 +315,7 @@ DFLAGS=%DFLAGS% -L/OPT:NOICF
{
enum confFile = "dmd.conf";
enum conf = `[Environment32]
DFLAGS=-I%@P%/../../../../../druntime/import -I%@P%/../../../../../phobos -L-L%@P%/../../../../../phobos/generated/{OS}/{BUILD}/32{exportDynamic}
DFLAGS=-I%@P%/../../../../../druntime/import -I%@P%/../../../../../phobos -L-L%@P%/../../../../../phobos/generated/{OS}/{BUILD}/32{exportDynamic} -fPIC
[Environment64]
DFLAGS=-I%@P%/../../../../../druntime/import -I%@P%/../../../../../phobos -L-L%@P%/../../../../../phobos/generated/{OS}/{BUILD}/64{exportDynamic} -fPIC
@ -1020,14 +1020,9 @@ void parseEnvironment()
// detect PIC
version(Posix)
{
// default to PIC on x86_64, use PIC=1/0 to en-/disable PIC.
// default to PIC if the host compiler supports, use PIC=1/0 to en-/disable PIC.
// Note that shared libraries and C files are always compiled with PIC.
bool pic;
if (model == "64")
pic = true;
else if (model == "32")
pic = false;
bool pic = true;
const picValue = env.getDefault("PIC", "");
switch (picValue)
{
@ -1037,6 +1032,15 @@ void parseEnvironment()
default:
throw abortBuild(format("Variable 'PIC' should be '0', '1' or <empty> but got '%s'", picValue));
}
version (X86)
{
// https://issues.dlang.org/show_bug.cgi?id=20466
static if (__VERSION__ < 2090)
{
pragma(msg, "Warning: PIC will be off by default for this build of DMD because of Issue 20466!");
pic = false;
}
}
env["PIC_FLAG"] = pic ? "-fPIC" : "";
}

6
test/Makefile
View file

@ -72,14 +72,10 @@ else
endif
export DMD=../generated/$(OS)/$(BUILD)/$(DMD_MODEL)/dmd
# default to PIC on x86_64, use PIC=1/0 to en-/disable PIC.
# default to PIC, use PIC=1/0 to en-/disable PIC.
# Note that shared libraries and C files are always compiled with PIC.
ifeq ($(PIC),)
ifeq ($(MODEL),64) # x86_64
PIC:=1
else
PIC:=0
endif
endif
ifeq ($(PIC),1)
export PIC_FLAG:=-fPIC

12
test/run.d
View file

@ -278,7 +278,7 @@ void ensureToolsExists(const string[string] env, const TestTool[] tools ...)
"-m"~env["MODEL"],
"-of"~targetBin,
sourceFile
] ~ tool.extraArgs;
] ~ getPicFlags(env) ~ tool.extraArgs;
}
writefln("Executing: %-(%s %)", command);
@ -518,15 +518,11 @@ string[string] getEnvironment()
auto druntimePath = environment.get("DRUNTIME_PATH", testPath(`../../druntime`));
auto phobosPath = environment.get("PHOBOS_PATH", testPath(`../../phobos`));
// default to PIC on x86_64, use PIC=1/0 to en-/disable PIC.
// default to PIC, use PIC=1/0 to en-/disable PIC.
// Note that shared libraries and C files are always compiled with PIC.
bool pic;
version(X86_64)
pic = true;
else version(X86)
bool pic = true;
if (environment.get("PIC", "") == "0")
pic = false;
if (environment.get("PIC", "0") == "1")
pic = true;
env["PIC_FLAG"] = pic ? "-fPIC" : "";
env["DFLAGS"] = "-I%s/import -I%s".format(druntimePath, phobosPath)