Fixes and improvements for source builds (JuliaLang#51422)

- A GMP patch was malformed; copy the corrected version from Yggdrasil
- Always invoke `patch` with `-f` to avoid interactive prompts during
build
- Don't quote the path to `python`, or nghttp2's configure script fails
with `error: Python interpreter is too old` (but `config.log` reveals
`"/usr/bin/python": No such file or directory`)

Make.inc

@@ -1190,7 +1190,7 @@ endif
 
 # We need python for things like BB triplet recognition.  We don't really care
 # about version, generally, so just find something that works:
-PYTHON := "$(shell which python 2>/dev/null || which python3 2>/dev/null || which python2 2>/dev/null || echo not found)"
+PYTHON := $(shell which python 2>/dev/null || which python3 2>/dev/null || which python2 2>/dev/null || echo not found)
 PYTHON_SYSTEM := $(shell $(PYTHON) -c 'from __future__ import print_function; import platform; print(platform.system())')
 
 # If we're running on Cygwin, but using a native-windows Python, we need to use cygpath -w

deps/gmp.mk

@@ -39,27 +39,27 @@ checksum-gmp: $(SRCCACHE)/gmp-$(GMP_VER).tar.bz2
 # Necessary for version 6.2.1, remove after next gmp release
 $(SRCCACHE)/gmp-$(GMP_VER)/gmp-HG-changeset.patch-applied: $(SRCCACHE)/gmp-$(GMP_VER)/source-extracted
 	cd $(dir $@) && \
-		patch -p1 < $(SRCDIR)/patches/gmp-HG-changeset.patch
+		patch -p1 -f < $(SRCDIR)/patches/gmp-HG-changeset.patch
 	echo 1 > $@
 
 $(SRCCACHE)/gmp-$(GMP_VER)/gmp-exception.patch-applied: $(SRCCACHE)/gmp-$(GMP_VER)/gmp-HG-changeset.patch-applied
 	cd $(dir $@) && \
-		patch -p1 < $(SRCDIR)/patches/gmp-exception.patch
+		patch -p1 -f < $(SRCDIR)/patches/gmp-exception.patch
 	echo 1 > $@
 
 $(SRCCACHE)/gmp-$(GMP_VER)/gmp_alloc_overflow_func.patch-applied: $(SRCCACHE)/gmp-$(GMP_VER)/gmp-exception.patch-applied
 	cd $(dir $@) && \
-		patch -p1 < $(SRCDIR)/patches/gmp_alloc_overflow_func.patch
+		patch -p1 -f < $(SRCDIR)/patches/gmp_alloc_overflow_func.patch
 	echo 1 > $@
 
 $(SRCCACHE)/gmp-$(GMP_VER)/gmp-CVE-2021-43618.patch-applied: $(SRCCACHE)/gmp-$(GMP_VER)/gmp_alloc_overflow_func.patch-applied
 	cd $(dir $@) && \
-		patch -p1 < $(SRCDIR)/patches/gmp-CVE-2021-43618.patch
+		patch -p1 -f < $(SRCDIR)/patches/gmp-CVE-2021-43618.patch
 	echo 1 > $@
 
 $(SRCCACHE)/gmp-$(GMP_VER)/gmp-more_alloc_overflow.patch-applied: $(SRCCACHE)/gmp-$(GMP_VER)/gmp-CVE-2021-43618.patch-applied
 	cd $(dir $@) && \
-		patch -p1 < $(SRCDIR)/patches/gmp-more_alloc_overflow.patch
+		patch -p1 -f < $(SRCDIR)/patches/gmp-more_alloc_overflow.patch
 	echo 1 > $@
 
 $(SRCCACHE)/gmp-$(GMP_VER)/source-patched: $(SRCCACHE)/gmp-$(GMP_VER)/gmp-more_alloc_overflow.patch-applied

deps/llvm.mk

@@ -214,7 +214,7 @@ LLVM_CMAKE += -DLLVM_SHLIB_SYMBOL_VERSION:STRING="JL_LLVM_$(LLVM_VER_SHORT)"
 LLVM_PATCH_PREV :=
 define LLVM_PATCH
 $$(SRCCACHE)/$$(LLVM_SRC_DIR)/$1.patch-applied: $$(SRCCACHE)/$$(LLVM_SRC_DIR)/source-extracted | $$(SRCDIR)/patches/$1.patch $$(LLVM_PATCH_PREV)
-	cd $$(SRCCACHE)/$$(LLVM_SRC_DIR)/llvm && patch -p1 < $$(SRCDIR)/patches/$1.patch
+	cd $$(SRCCACHE)/$$(LLVM_SRC_DIR)/llvm && patch -p1 -f < $$(SRCDIR)/patches/$1.patch
 	echo 1 > $$@
 # declare that applying any patch must re-run the compile step
 $$(LLVM_BUILDDIR_withtype)/build-compiled: $$(SRCCACHE)/$$(LLVM_SRC_DIR)/$1.patch-applied
@@ -223,7 +223,7 @@ endef
 
 define LLVM_PROJ_PATCH
 $$(SRCCACHE)/$$(LLVM_SRC_DIR)/$1.patch-applied: $$(SRCCACHE)/$$(LLVM_SRC_DIR)/source-extracted | $$(SRCDIR)/patches/$1.patch $$(LLVM_PATCH_PREV)
-	cd $$(SRCCACHE)/$$(LLVM_SRC_DIR) && patch -p1 < $$(SRCDIR)/patches/$1.patch
+	cd $$(SRCCACHE)/$$(LLVM_SRC_DIR) && patch -p1 -f < $$(SRCDIR)/patches/$1.patch
 	echo 1 > $$@
 # declare that applying any patch must re-run the compile step
 $$(LLVM_BUILDDIR_withtype)/build-compiled: $$(SRCCACHE)/$$(LLVM_SRC_DIR)/$1.patch-applied
@@ -249,7 +249,7 @@ $(BUILDDIR)/julia-patches.patch:
 
 # Apply the patch.
 $(SRCCACHE)/$(LLVM_SRC_DIR)/julia-patches.patch-applied: $(BUILDDIR)/julia-patches.patch $(SRCCACHE)/$(LLVM_SRC_DIR)/source-extracted
-	cd $(SRCCACHE)/$(LLVM_SRC_DIR) && patch -p1 < $(realpath $<)
+	cd $(SRCCACHE)/$(LLVM_SRC_DIR) && patch -p1 -f < $(realpath $<)
 	echo 1 > $@
 
 # Require application of Julia's patchset before configuring LLVM.

deps/patches/gmp-more_alloc_overflow.patch

@@ -1,6 +1,6 @@
-diff -ur gmp-6.2.1.orig/mpz/n_pow_ui.c gmp-6.2.1/mpz/n_pow_ui.c
---- gmp-6.2.1.orig/mpz/n_pow_ui.c	2023-09-08 11:41:16.620551175 +0200
-+++ gmp-6.2.1/mpz/n_pow_ui.c	2023-09-08 12:49:29.650492180 +0200
+diff -ur a/mpz/n_pow_ui.c b/mpz/n_pow_ui.c
+--- a/mpz/n_pow_ui.c
++++ b/mpz/n_pow_ui.c
 @@ -220,8 +220,7 @@
    umul_ppmm (ovfl, rtwos_bits, e, btwos);
    if (ovfl)
@@ -21,10 +21,10 @@ diff -ur gmp-6.2.1.orig/mpz/n_pow_ui.c gmp-6.2.1/mpz/n_pow_ui.c
      }
    ralloc = ralloc / GMP_NUMB_BITS + 5;
 
-diff -ur gmp-6.2.1.orig/tal-reent.c gmp-6.2.1/tal-reent.c
---- gmp-6.2.1.orig/tal-reent.c	2020-11-14 19:45:09.000000000 +0100
-+++ gmp-6.2.1/tal-reent.c	2023-09-08 12:10:34.061357613 +0200
-@@ -61,6 +61,11 @@
+diff -ur a/tal-reent.c b/tal-reent.c
+--- a/tal-reent.c
++++ b/tal-reent.c
+@@ -61,6 +61,10 @@
 
    total_size = size + HSIZ;
    p = __GMP_ALLOCATE_FUNC_TYPE (total_size, char);