some reverts & fixes

workflow:
- revert 'pinact for security' for readability
  from 831c3fa
tccpp.c:
- remove code that allows tcc to parse numbers incorrectly (*)
  from 829c848
tccgen.c:
- Revert "Relaxed the 'incompatible pointer type' warning a bit" (*)
  from d9ec17d.
tccrun.c:
- remove support for -nostdlib -run
  for simplicity, we require "main" with tcc -run always
tccpp.c:
- Revert "Free all preprocessor memmory in case of error."
  from c96f0ca
  Remove TinyAlloc->limit instead.  Thus it can do also bigger
  allocs.  Big TokenStrings (like 200kb+ when compiling tcc)
  may come from inline functions or from large initializers.
Makefile/configure:
- use --config-pie for configuring tcc output only
- use -fPIC with clang-x86_64 to avoid 32-bit relocs
libtcc.c:
- fix "tcc file.c -run" i.e. -run as last argument
i386-gen.c:
- PIC refactor

(*) sorry, but code in tcc should have a minimum of generic relevance

Author: grischka

.github/workflows/build.yml

@@ -9,31 +9,31 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 2
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@v4
     - name: make & test tcc (x86_64-linux)
       run: ./configure && make && make test -k
 
   test-x86_64-osx:
     runs-on: macos-15-intel
     timeout-minutes: 2
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@v4
     - name: make & test tcc (x86_64-osx)
       run: ./configure && make && make test -k
 
   test-aarch64-osx:
     runs-on: macos-15
     timeout-minutes: 2
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@v4
     - name: make & test tcc (aarch64-osx)
       run: ./configure && make && make test -k
 
   test-x86_64-win32:
     runs-on: windows-2025
     timeout-minutes: 6
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@v4
     - name: make & test tcc (x86_64-win32)
       shell: cmd
       run: |
@@ -44,7 +44,7 @@ jobs:
         C:\msys64\usr\bin\bash -l -c "pacman -S --noconfirm mingw-w64-x86_64-gcc"
         echo ::endgroup::
         C:\msys64\usr\bin\bash -l -c "./configure && make && make test -k"
-    - uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1.13.0
+    - uses: ilammy/msvc-dev-cmd@v1
       with:
         arch: amd64
     - name: build with MSVC (x86_64-win32)
@@ -61,7 +61,7 @@ jobs:
     runs-on: windows-2025
     timeout-minutes: 6
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@v4
     - name: make & test tcc (i386-win32)
       shell: cmd
       run: |
@@ -72,7 +72,7 @@ jobs:
         C:\msys64\usr\bin\bash -l -c "pacman -S --noconfirm mingw-w64-i686-gcc"
         echo ::endgroup::
         C:\msys64\usr\bin\bash -l -c "./configure && make && make test -k"
-    - uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1.13.0
+    - uses: ilammy/msvc-dev-cmd@v1
       with:
         arch: x86
     - name: build with MSVC (i386-win32)
@@ -89,8 +89,8 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 8
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
-    - uses: uraimo/run-on-arch-action@d94c13912ea685de38fccc1109385b83fd79427d # v3.0.1
+    - uses: actions/checkout@v4
+    - uses: uraimo/run-on-arch-action@v3
       name: make & test tcc (armv7-linux)
       with:
         arch: armv7
@@ -107,8 +107,8 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 8
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
-    - uses: uraimo/run-on-arch-action@d94c13912ea685de38fccc1109385b83fd79427d # v3.0.1
+    - uses: actions/checkout@v4
+    - uses: uraimo/run-on-arch-action@v3
       name: make & test tcc (aarch64-linux)
       with:
         arch: aarch64
@@ -125,8 +125,8 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 8
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
-    - uses: uraimo/run-on-arch-action@d94c13912ea685de38fccc1109385b83fd79427d # v3.0.1
+    - uses: actions/checkout@v4
+    - uses: uraimo/run-on-arch-action@v3
       name: make & test tcc (riscv64-linux)
       with:
         arch: riscv64

Makefile

@@ -24,11 +24,6 @@ CFLAGS += $(CPPFLAGS)
 VPATH = $(TOPSRC)
 -LTCC = $(TOP)/$(LIBTCC)
 
-ifeq ($(CONFIG_pie),yes)
-CFLAGS += -fPIE
-LDFLAGS += -pie
-endif
-
 ifdef CONFIG_WIN32
  CFG = -win
  ifneq ($(CONFIG_static),yes)
@@ -296,6 +291,11 @@ tcc_p$(EXESUF): $($T_FILES)
 libtcc.a: $(LIBTCC_OBJ)
 	$S$(AR) rcs $@ $^
 
+ifeq ($(CC_NAME)-$(ARCH),clang-x86_64)
+# avoid 32-bit relocations in libtcc.a for its usage with tcc -run
+libtcc.a: override CFLAGS += -fPIC
+endif
+
 # dynamic libtcc library
 libtcc.so: $(LIBTCC_OBJ)
 	$S$(CC) -shared -Wl,-soname,$@ -o $@ $^ $(LIBS) $(LDFLAGS)
@@ -372,7 +372,7 @@ IR = $(IM) mkdir -p $2 && cp -r $1/. $2
 IM = @echo "-> $2 : $1" ;
 BINCHECK = $(if $(wildcard $(PROGS) *-tcc$(EXESUF)),,@echo "Makefile: nothing found to install" && exit 1)
 
-EXTRA_O = runmain.o run_nostdlib.o bt-exe.o bt-dll.o bt-log.o bcheck.o get_pc_thunk.o
+EXTRA_O = runmain.o bt-exe.o bt-dll.o bt-log.o bcheck.o
 
 # install progs & libs
 install-unx:
@@ -394,7 +394,7 @@ endif
 # uninstall
 uninstall-unx:
 	@rm -fv $(addprefix "$(bindir)/",$(PROGS) $(PROGS_CROSS))
-	@rm -fv $(addprefix "$(libdir)/", libtcc*.a libtcc*.so libtcc.dylib,$P)
+	@rm -fv $(addprefix "$(libdir)/", libtcc*.a libtcc*.so libtcc.dylib)
 	@rm -fv $(addprefix "$(includedir)/", libtcc.h)
 	@rm -fv "$(mandir)/man1/tcc.1" "$(infodir)/tcc-doc.info"
 	@rm -fv "$(docdir)/tcc-doc.html"

arm-asm.c

@@ -149,11 +149,8 @@ ST_FUNC void g(int c)
     if (nocode_wanted)
         return;
     ind1 = ind + 1;
-    if ((unsigned)ind1 > cur_text_section->data_allocated) {
-        if (ind1 < 0)
-	    tcc_error("program too big");
+    if (ind1 > cur_text_section->data_allocated)
         section_realloc(cur_text_section, ind1);
-    }
     cur_text_section->data[ind] = c;
     ind = ind1;
 }

arm-gen.c

@@ -257,11 +257,8 @@ void o(uint32_t i)
   if (!cur_text_section)
     tcc_error("compiler error! This happens f.ex. if the compiler\n"
          "can't evaluate constant expressions outside of a function.");
-  if ((unsigned)ind1 > cur_text_section->data_allocated) {
-    if (ind1 < 0)
-      tcc_error("program too big");
+  if (ind1 > cur_text_section->data_allocated)
     section_realloc(cur_text_section, ind1);
-  }
   cur_text_section->data[ind++] = i&255;
   i>>=8;
   cur_text_section->data[ind++] = i&255;

arm64-asm.c

@@ -31,11 +31,8 @@ ST_FUNC void g(int c)
     if (nocode_wanted)
         return;
     ind1 = ind + 1;
-    if ((unsigned)ind1 > cur_text_section->data_allocated) {
-        if (ind1 < 0)
-	    tcc_error("program too big");
+    if (ind1 > cur_text_section->data_allocated)
         section_realloc(cur_text_section, ind1);
-    }
     cur_text_section->data[ind] = c;
     ind = ind1;
 }

arm64-gen.c

@@ -117,11 +117,8 @@ ST_FUNC void o(unsigned int c)
     int ind1 = ind + 4;
     if (nocode_wanted)
         return;
-    if ((unsigned)ind1 > cur_text_section->data_allocated) {
-        if (ind1 < 0)
-	    tcc_error("program too big");
+    if (ind1 > cur_text_section->data_allocated)
         section_realloc(cur_text_section, ind1);
-    }
     write32le(cur_text_section->data + ind, c);
     ind = ind1;
 }

c67-gen.c

@@ -195,11 +195,8 @@ void C67_g(int c)
     fprintf(f, " %08X", c);
 #endif
     ind1 = ind + 4;
-    if ((unsigned)ind1 > (int) cur_text_section->data_allocated) {
-        if (ind1 < 0)
-	    tcc_error("program too big");
+    if (ind1 > (int) cur_text_section->data_allocated)
 	section_realloc(cur_text_section, ind1);
-    }
     cur_text_section->data[ind] = c & 0xff;
     cur_text_section->data[ind + 1] = (c >> 8) & 0xff;
     cur_text_section->data[ind + 2] = (c >> 16) & 0xff;

configure

@@ -230,7 +230,7 @@ Advanced options (experts only):
   --config-new_dtags=yes   use new ELF DTAGs (DT_RUNPATH instead of DT_RPATH)
   --config-codesign=no     do not use codesign on apple to sign executables
   --config-dwarf=x         use dwarf debug info instead of stabs (x=2..5)
-  --config-pie             compile with pie
+  --config-pie             let tcc generate position independent executables
 
 Cross build options (experimental):
   --cpu=CPU                target CPU [$cpu]